diff --git a/build/test/cache/test_Vlength.c b/build/test/cache/test_Vlength.c
new file mode 100644
index 0000000..4aad73b
--- /dev/null
+++ b/build/test/cache/test_Vlength.c
@@ -0,0 +1,41 @@
+#include "src/funktion.h"
+#include "/var/lib/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h"
+
+
+void setUp(void)
+
+{
+
+}
+
+
+
+void tearDown(void)
+
+{
+
+}
+
+
+
+void test_Vlength_NeedToImplement(void)
+
+{
+
+    double a = 6;
+
+    double b = 8;
+
+    double c = 0;
+
+    double exp = Vlength(a,b,c);
+
+    double result = 10;
+
+    UnityAssertFloatsWithin((UNITY_FLOAT)((UNITY_FLOAT)((result)) * (UNITY_FLOAT)(0.00001f)), (UNITY_FLOAT)((UNITY_FLOAT)((result))), (UNITY_FLOAT)((UNITY_FLOAT)((exp))), ((
+
+   ((void *)0)
+
+   )), (UNITY_UINT)((UNITY_UINT)(19)));
+
+}
diff --git a/build/test/dependencies/test_Vlength.d b/build/test/dependencies/test_Vlength.d
new file mode 100644
index 0000000..a69262c
--- /dev/null
+++ b/build/test/dependencies/test_Vlength.d
@@ -0,0 +1,4 @@
+build/test/out/c/test_Vlength.o: test/test_Vlength.c \
+ /var/lib/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h \
+ /var/lib/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity_internals.h \
+ src/funktion.h
diff --git a/build/test/dependencies/test_Vlength_runner.d b/build/test/dependencies/test_Vlength_runner.d
new file mode 100644
index 0000000..801034b
--- /dev/null
+++ b/build/test/dependencies/test_Vlength_runner.d
@@ -0,0 +1,4 @@
+build/test/out/c/test_Vlength_runner.o: \
+ build/test/runners/test_Vlength_runner.c \
+ /var/lib/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h \
+ /var/lib/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity_internals.h
diff --git a/build/test/out/c/funktion.o b/build/test/out/c/funktion.o
index 2ffde3c..96207b8 100644
Binary files a/build/test/out/c/funktion.o and b/build/test/out/c/funktion.o differ
diff --git a/build/test/out/c/test_Vlength.o b/build/test/out/c/test_Vlength.o
new file mode 100644
index 0000000..a0eaf3b
Binary files /dev/null and b/build/test/out/c/test_Vlength.o differ
diff --git a/build/test/out/c/test_Vlength_runner.o b/build/test/out/c/test_Vlength_runner.o
new file mode 100644
index 0000000..015e017
Binary files /dev/null and b/build/test/out/c/test_Vlength_runner.o differ
diff --git a/build/test/out/test_Akkortrichtsatz.out b/build/test/out/test_Akkortrichtsatz.out
index 99469b1..b4ed782 100755
Binary files a/build/test/out/test_Akkortrichtsatz.out and b/build/test/out/test_Akkortrichtsatz.out differ
diff --git a/build/test/out/test_Anlagenabnutzungsgrad.out b/build/test/out/test_Anlagenabnutzungsgrad.out
index 822b92a..2beff14 100755
Binary files a/build/test/out/test_Anlagenabnutzungsgrad.out and b/build/test/out/test_Anlagenabnutzungsgrad.out differ
diff --git a/build/test/out/test_Anlagenintensitaet.out b/build/test/out/test_Anlagenintensitaet.out
index 9bf92c4..1ff05c0 100755
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diff --git a/build/test/out/test_Anlagenproduktivitaet.out b/build/test/out/test_Anlagenproduktivitaet.out
index 5c1b979..25bf07c 100755
Binary files a/build/test/out/test_Anlagenproduktivitaet.out and b/build/test/out/test_Anlagenproduktivitaet.out differ
diff --git a/build/test/out/test_Arbeitsproduktivitaet.out b/build/test/out/test_Arbeitsproduktivitaet.out
index fcc0573..d269061 100755
Binary files a/build/test/out/test_Arbeitsproduktivitaet.out and b/build/test/out/test_Arbeitsproduktivitaet.out differ
diff --git a/build/test/out/test_Cashflow_zu_Gesamtkapital.out b/build/test/out/test_Cashflow_zu_Gesamtkapital.out
index 3075664..29fbbc0 100755
Binary files a/build/test/out/test_Cashflow_zu_Gesamtkapital.out and b/build/test/out/test_Cashflow_zu_Gesamtkapital.out differ
diff --git a/build/test/out/test_Dynamische_Amortisationszeit.out b/build/test/out/test_Dynamische_Amortisationszeit.out
index d12940a..31a0b9a 100755
Binary files a/build/test/out/test_Dynamische_Amortisationszeit.out and b/build/test/out/test_Dynamische_Amortisationszeit.out differ
diff --git a/build/test/out/test_Effektivverzinsung.out b/build/test/out/test_Effektivverzinsung.out
index 7d50624..5dabee3 100755
Binary files a/build/test/out/test_Effektivverzinsung.out and b/build/test/out/test_Effektivverzinsung.out differ
diff --git a/build/test/out/test_Finanzierungsregeln.out b/build/test/out/test_Finanzierungsregeln.out
index 5d7fc0e..35d7112 100755
Binary files a/build/test/out/test_Finanzierungsregeln.out and b/build/test/out/test_Finanzierungsregeln.out differ
diff --git a/build/test/out/test_GewinnMaximum.out b/build/test/out/test_GewinnMaximum.out
index 0241db3..46d18d0 100755
Binary files a/build/test/out/test_GewinnMaximum.out and b/build/test/out/test_GewinnMaximum.out differ
diff --git a/build/test/out/test_Kalkulatorische_Zinsen.out b/build/test/out/test_Kalkulatorische_Zinsen.out
index 492cb0f..7d0e67a 100755
Binary files a/build/test/out/test_Kalkulatorische_Zinsen.out and b/build/test/out/test_Kalkulatorische_Zinsen.out differ
diff --git a/build/test/out/test_Kritische_Menge.out b/build/test/out/test_Kritische_Menge.out
index e561b47..fb9c592 100755
Binary files a/build/test/out/test_Kritische_Menge.out and b/build/test/out/test_Kritische_Menge.out differ
diff --git a/build/test/out/test_Stueckzeitakkort.out b/build/test/out/test_Stueckzeitakkort.out
index 2b081d5..bbd0a27 100755
Binary files a/build/test/out/test_Stueckzeitakkort.out and b/build/test/out/test_Stueckzeitakkort.out differ
diff --git a/build/test/out/test_Vlength.out b/build/test/out/test_Vlength.out
new file mode 100755
index 0000000..3435c72
Binary files /dev/null and b/build/test/out/test_Vlength.out differ
diff --git a/build/test/out/test_Vshift.out b/build/test/out/test_Vshift.out
index 512265a..bba002f 100755
Binary files a/build/test/out/test_Vshift.out and b/build/test/out/test_Vshift.out differ
diff --git a/build/test/out/test_Zeitlohn.out b/build/test/out/test_Zeitlohn.out
index efa6a95..ed72667 100755
Binary files a/build/test/out/test_Zeitlohn.out and b/build/test/out/test_Zeitlohn.out differ
diff --git a/build/test/out/test_angebotserfolg.out b/build/test/out/test_angebotserfolg.out
index be8d5a6..ae63ba2 100755
Binary files a/build/test/out/test_angebotserfolg.out and b/build/test/out/test_angebotserfolg.out differ
diff --git a/build/test/out/test_eigenkapital_Rentabilitaeten.out b/build/test/out/test_eigenkapital_Rentabilitaeten.out
index 3311c7e..414afc6 100755
Binary files a/build/test/out/test_eigenkapital_Rentabilitaeten.out and b/build/test/out/test_eigenkapital_Rentabilitaeten.out differ
diff --git a/build/test/out/test_erloesfunktion.out b/build/test/out/test_erloesfunktion.out
index 8f16ea7..ef88916 100755
Binary files a/build/test/out/test_erloesfunktion.out and b/build/test/out/test_erloesfunktion.out differ
diff --git a/build/test/out/test_gesamtkapital_Rentabilitaeten.out b/build/test/out/test_gesamtkapital_Rentabilitaeten.out
index 70ace0d..e84ba8d 100755
Binary files a/build/test/out/test_gesamtkapital_Rentabilitaeten.out and b/build/test/out/test_gesamtkapital_Rentabilitaeten.out differ
diff --git a/build/test/out/test_grenzGewinn.out b/build/test/out/test_grenzGewinn.out
index 997a5fa..c2027ec 100755
Binary files a/build/test/out/test_grenzGewinn.out and b/build/test/out/test_grenzGewinn.out differ
diff --git a/build/test/out/test_marktanteil.out b/build/test/out/test_marktanteil.out
index fb923b8..7dc8382 100755
Binary files a/build/test/out/test_marktanteil.out and b/build/test/out/test_marktanteil.out differ
diff --git a/build/test/out/test_trapezFlaeche.out b/build/test/out/test_trapezFlaeche.out
index 60a2f9a..d54d13a 100755
Binary files a/build/test/out/test_trapezFlaeche.out and b/build/test/out/test_trapezFlaeche.out differ
diff --git a/build/test/preprocess/files/test_Vlength.c b/build/test/preprocess/files/test_Vlength.c
new file mode 100644
index 0000000..4aad73b
--- /dev/null
+++ b/build/test/preprocess/files/test_Vlength.c
@@ -0,0 +1,41 @@
+#include "src/funktion.h"
+#include "/var/lib/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h"
+
+
+void setUp(void)
+
+{
+
+}
+
+
+
+void tearDown(void)
+
+{
+
+}
+
+
+
+void test_Vlength_NeedToImplement(void)
+
+{
+
+    double a = 6;
+
+    double b = 8;
+
+    double c = 0;
+
+    double exp = Vlength(a,b,c);
+
+    double result = 10;
+
+    UnityAssertFloatsWithin((UNITY_FLOAT)((UNITY_FLOAT)((result)) * (UNITY_FLOAT)(0.00001f)), (UNITY_FLOAT)((UNITY_FLOAT)((result))), (UNITY_FLOAT)((UNITY_FLOAT)((exp))), ((
+
+   ((void *)0)
+
+   )), (UNITY_UINT)((UNITY_UINT)(19)));
+
+}
diff --git a/build/test/preprocess/includes/test_Vlength.c b/build/test/preprocess/includes/test_Vlength.c
new file mode 100644
index 0000000..4e923ea
--- /dev/null
+++ b/build/test/preprocess/includes/test_Vlength.c
@@ -0,0 +1,3 @@
+---
+- "/var/lib/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h"
+- src/funktion.h
diff --git a/build/test/results/test_Akkortrichtsatz.pass b/build/test/results/test_Akkortrichtsatz.pass
index 43efa9e..bbf42c7 100644
--- a/build/test/results/test_Akkortrichtsatz.pass
+++ b/build/test/results/test_Akkortrichtsatz.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 552.000000
-:time: 0.0013742630000024292
+:time: 0.002716534999990472
diff --git a/build/test/results/test_Anlagenabnutzungsgrad.pass b/build/test/results/test_Anlagenabnutzungsgrad.pass
index 8c284be..71c79a3 100644
--- a/build/test/results/test_Anlagenabnutzungsgrad.pass
+++ b/build/test/results/test_Anlagenabnutzungsgrad.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 60.000000
-:time: 0.001311879000013505
+:time: 0.0018504879999454715
diff --git a/build/test/results/test_Anlagenintensitaet.pass b/build/test/results/test_Anlagenintensitaet.pass
index 6024dfa..8e428b8 100644
--- a/build/test/results/test_Anlagenintensitaet.pass
+++ b/build/test/results/test_Anlagenintensitaet.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 4878.048780
-:time: 0.003578473999994003
+:time: 0.0021067100000209393
diff --git a/build/test/results/test_Anlagenproduktivitaet.pass b/build/test/results/test_Anlagenproduktivitaet.pass
index 19284f8..d023953 100644
--- a/build/test/results/test_Anlagenproduktivitaet.pass
+++ b/build/test/results/test_Anlagenproduktivitaet.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 18.203304
-:time: 0.0034162950000222736
+:time: 0.006271555000012086
diff --git a/build/test/results/test_Arbeitsproduktivitaet.pass b/build/test/results/test_Arbeitsproduktivitaet.pass
index e0f465a..753eb14 100644
--- a/build/test/results/test_Arbeitsproduktivitaet.pass
+++ b/build/test/results/test_Arbeitsproduktivitaet.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 60.000000
-:time: 0.0014241249999713546
+:time: 0.017702286000030654
diff --git a/build/test/results/test_Cashflow_zu_Gesamtkapital.pass b/build/test/results/test_Cashflow_zu_Gesamtkapital.pass
index eeec254..eef6352 100644
--- a/build/test/results/test_Cashflow_zu_Gesamtkapital.pass
+++ b/build/test/results/test_Cashflow_zu_Gesamtkapital.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 0.158038
-:time: 0.0038018960000272273
+:time: 0.0021245269999781158
diff --git a/build/test/results/test_Dynamische_Amortisationszeit.pass b/build/test/results/test_Dynamische_Amortisationszeit.pass
index 52f9f94..2d6e196 100644
--- a/build/test/results/test_Dynamische_Amortisationszeit.pass
+++ b/build/test/results/test_Dynamische_Amortisationszeit.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 189.421906
-:time: 0.00487054799998532
+:time: 0.002250794000019596
diff --git a/build/test/results/test_Effektivverzinsung.pass b/build/test/results/test_Effektivverzinsung.pass
index d9199d7..a608753 100644
--- a/build/test/results/test_Effektivverzinsung.pass
+++ b/build/test/results/test_Effektivverzinsung.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 16.034390
-:time: 0.001284409000049891
+:time: 0.002290294999966136
diff --git a/build/test/results/test_Finanzierungsregeln.pass b/build/test/results/test_Finanzierungsregeln.pass
index 6059ccf..075282f 100644
--- a/build/test/results/test_Finanzierungsregeln.pass
+++ b/build/test/results/test_Finanzierungsregeln.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 0.051041
-:time: 0.001419406000024992
+:time: 0.0019402200000513403
diff --git a/build/test/results/test_GewinnMaximum.pass b/build/test/results/test_GewinnMaximum.pass
index e22505c..86fcae0 100644
--- a/build/test/results/test_GewinnMaximum.pass
+++ b/build/test/results/test_GewinnMaximum.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 251.000000
-:time: 0.004612633999954596
+:time: 0.003772610000055465
diff --git a/build/test/results/test_Kalkulatorische_Zinsen.pass b/build/test/results/test_Kalkulatorische_Zinsen.pass
index 70560de..0353def 100644
--- a/build/test/results/test_Kalkulatorische_Zinsen.pass
+++ b/build/test/results/test_Kalkulatorische_Zinsen.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 1.440000
-:time: 0.0015531099999748221
+:time: 0.0028451340000401615
diff --git a/build/test/results/test_Kritische_Menge.pass b/build/test/results/test_Kritische_Menge.pass
index 03f86df..bab50a4 100644
--- a/build/test/results/test_Kritische_Menge.pass
+++ b/build/test/results/test_Kritische_Menge.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss -12.096026
-:time: 0.002954327999987072
+:time: 0.002418125999952281
diff --git a/build/test/results/test_Stueckzeitakkort.pass b/build/test/results/test_Stueckzeitakkort.pass
index de0a145..2ef33fe 100644
--- a/build/test/results/test_Stueckzeitakkort.pass
+++ b/build/test/results/test_Stueckzeitakkort.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - '96600.000000'
-:time: 0.003532134000010956
+:time: 0.0021736159999363736
diff --git a/build/test/results/test_Vlength.pass b/build/test/results/test_Vlength.pass
new file mode 100644
index 0000000..f336485
--- /dev/null
+++ b/build/test/results/test_Vlength.pass
@@ -0,0 +1,20 @@
+---
+:source:
+  :path: test
+  :file: test_Vlength.c
+:successes:
+- :test: test_Vlength_NeedToImplement
+  :line: 12
+  :message: ''
+  :unity_test_time: 0
+:failures: []
+:ignores: []
+:counts:
+  :total: 1
+  :passed: 1
+  :failed: 0
+  :ignored: 0
+:stdout:
+- 'Die laenge das Vektors betraegt: 10.000000'
+- ''
+:time: 0.0018555540000306792
diff --git a/build/test/results/test_Vshift.pass b/build/test/results/test_Vshift.pass
index d61f585..4cbf72e 100644
--- a/build/test/results/test_Vshift.pass
+++ b/build/test/results/test_Vshift.pass
@@ -15,4 +15,4 @@
   :failed: 0
   :ignored: 0
 :stdout: []
-:time: 0.0031678380000244033
+:time: 0.0022123349999674247
diff --git a/build/test/results/test_Zeitlohn.pass b/build/test/results/test_Zeitlohn.pass
index 0870ee7..1ac1ec8 100644
--- a/build/test/results/test_Zeitlohn.pass
+++ b/build/test/results/test_Zeitlohn.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 3450.000000
-:time: 0.0021419259999788665
+:time: 0.0013050549999888972
diff --git a/build/test/results/test_angebotserfolg.pass b/build/test/results/test_angebotserfolg.pass
index 6db135d..7173d70 100644
--- a/build/test/results/test_angebotserfolg.pass
+++ b/build/test/results/test_angebotserfolg.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 225.000000
-:time: 0.0012237379999646691
+:time: 0.0013557099999843558
diff --git a/build/test/results/test_eigenkapital_Rentabilitaeten.pass b/build/test/results/test_eigenkapital_Rentabilitaeten.pass
index 95ac05d..ce2eba4 100644
--- a/build/test/results/test_eigenkapital_Rentabilitaeten.pass
+++ b/build/test/results/test_eigenkapital_Rentabilitaeten.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 62.500000
-:time: 0.0016901430000189066
+:time: 0.0019405639999376945
diff --git a/build/test/results/test_erloesfunktion.pass b/build/test/results/test_erloesfunktion.pass
index 7074626..fbb93df 100644
--- a/build/test/results/test_erloesfunktion.pass
+++ b/build/test/results/test_erloesfunktion.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 4000.000000
-:time: 0.004961128999980247
+:time: 0.0014161440000179937
diff --git a/build/test/results/test_gesamtkapital_Rentabilitaeten.pass b/build/test/results/test_gesamtkapital_Rentabilitaeten.pass
index cfdf173..b7c3a69 100644
--- a/build/test/results/test_gesamtkapital_Rentabilitaeten.pass
+++ b/build/test/results/test_gesamtkapital_Rentabilitaeten.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 27.136929
-:time: 0.001966502000016135
+:time: 0.0015480409999781841
diff --git a/build/test/results/test_grenzGewinn.pass b/build/test/results/test_grenzGewinn.pass
index f1d76f9..fc118e5 100644
--- a/build/test/results/test_grenzGewinn.pass
+++ b/build/test/results/test_grenzGewinn.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 1141.000000
-:time: 0.0035862870000187286
+:time: 0.0018914749999794367
diff --git a/build/test/results/test_marktanteil.pass b/build/test/results/test_marktanteil.pass
index c40b5cb..4e351a6 100644
--- a/build/test/results/test_marktanteil.pass
+++ b/build/test/results/test_marktanteil.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 21.739130
-:time: 0.002217110000003686
+:time: 0.006650595999985853
diff --git a/build/test/results/test_trapezFlaeche.pass b/build/test/results/test_trapezFlaeche.pass
index 871a05e..41f911d 100644
--- a/build/test/results/test_trapezFlaeche.pass
+++ b/build/test/results/test_trapezFlaeche.pass
@@ -17,4 +17,4 @@
 :stdout:
 - 'Flaeche vom Trapez beträgt: 21.000000'
 - Testergebniss 21.000000
-:time: 0.0013821770000390643
+:time: 0.001847877000045628
diff --git a/build/test/runners/test_Vlength_runner.c b/build/test/runners/test_Vlength_runner.c
new file mode 100644
index 0000000..0b4fe55
--- /dev/null
+++ b/build/test/runners/test_Vlength_runner.c
@@ -0,0 +1,81 @@
+/* AUTOGENERATED FILE. DO NOT EDIT. */
+
+/*=======Automagically Detected Files To Include=====*/
+#include "unity.h"
+
+int GlobalExpectCount;
+int GlobalVerifyOrder;
+char* GlobalOrderError;
+
+/*=======External Functions This Runner Calls=====*/
+extern void setUp(void);
+extern void tearDown(void);
+extern void test_Vlength_NeedToImplement(void);
+
+
+/*=======Mock Management=====*/
+static void CMock_Init(void)
+{
+  GlobalExpectCount = 0;
+  GlobalVerifyOrder = 0;
+  GlobalOrderError = NULL;
+}
+static void CMock_Verify(void)
+{
+}
+static void CMock_Destroy(void)
+{
+}
+
+/*=======Test Reset Options=====*/
+void resetTest(void);
+void resetTest(void)
+{
+  tearDown();
+  CMock_Verify();
+  CMock_Destroy();
+  CMock_Init();
+  setUp();
+}
+void verifyTest(void);
+void verifyTest(void)
+{
+  CMock_Verify();
+}
+
+/*=======Test Runner Used To Run Each Test=====*/
+static void run_test(UnityTestFunction func, const char* name, UNITY_LINE_TYPE line_num)
+{
+    Unity.CurrentTestName = name;
+    Unity.CurrentTestLineNumber = line_num;
+#ifdef UNITY_USE_COMMAND_LINE_ARGS
+    if (!UnityTestMatches())
+        return;
+#endif
+    Unity.NumberOfTests++;
+    UNITY_CLR_DETAILS();
+    UNITY_EXEC_TIME_START();
+    CMock_Init();
+    if (TEST_PROTECT())
+    {
+        setUp();
+        func();
+    }
+    if (TEST_PROTECT())
+    {
+        tearDown();
+        CMock_Verify();
+    }
+    CMock_Destroy();
+    UNITY_EXEC_TIME_STOP();
+    UnityConcludeTest();
+}
+
+/*=======MAIN=====*/
+int main(void)
+{
+  UnityBegin("test_Vlength.c");
+  run_test(test_Vlength_NeedToImplement, "test_Vlength_NeedToImplement", 12);
+
+  return UnityEnd();
+}
diff --git a/test/test_Vlength.c b/test/test_Vlength.c
new file mode 100644
index 0000000..400172a
--- /dev/null
+++ b/test/test_Vlength.c
@@ -0,0 +1,21 @@
+#include "unity.h"
+#include "funktion.h"
+
+void setUp(void)
+{
+}
+
+void tearDown(void)
+{
+}
+
+void test_Vlength_NeedToImplement(void)
+{
+    double a = 6;
+    double b = 8;
+    double c = 0;
+    double exp = Vlength(a,b,c);
+    double result = 10;
+    TEST_ASSERT_EQUAL_FLOAT(result,exp);
+}
+