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added detransposeSplit and tests

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This commit is contained in:
Derek McQuay 2016-02-12 10:53:42 -08:00
parent e0ee206df9
commit 15c7a2787c
2 changed files with 86 additions and 10 deletions
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33
psyfer/transposition.go
View File

@ -43,3 +43,36 @@ func TransposeSplit(input string) string {
}
return split
}
func DeTransposeRailFence(input string) string {
rf := ""
for i := 0; i < len(input); i += 2 {
rf += string(input[i])
}
for i := 1; i < len(input); i += 2 {
rf += string(input[i])
}
return rf
}
func DeTransposeSplit(input string) string {
desplit := ""
if len(input)%2 == 0 {
for i := 0; i < len(input); i += 2 {
desplit += string(input[i])
}
for i := 1; i < len(input); i += 2 {
desplit += string(input[i])
}
} else {
for i := 0; i < len(input)-2; i += 2 {
desplit += string(input[i])
}
for i := 1; i < len(input)-2; i += 2 {
desplit += string(input[i])
}
// fmt.Println(desplit)
desplit += string(input[len(input)-2]) + string(input[len(input)-1])
}
return desplit
}

63
psyfer/transposition_test.go
View File

@ -8,7 +8,7 @@ func TestTransposeRailFence(t *testing.T) {
actual := TransposeRailFence(input)
if expected != actual {
t.Errorf(
"failed TransposeRailFence:\n\texpected: % x\n\t actual: % x",
"failed TransposeRailFence:\n\texpected: % q\n\t actual: % q",
expected,
actual,
)
@ -18,7 +18,7 @@ func TestTransposeRailFence(t *testing.T) {
actual = TransposeRailFence(input)
if expected != actual {
t.Errorf(
"failed TransposeRailFence:\n\texpected: % x\n\t actual: % x",
"failed TransposeRailFence:\n\texpected: % q\n\t actual: % q",
expected,
actual,
)
@ -28,7 +28,7 @@ func TestTransposeRailFence(t *testing.T) {
actual = TransposeRailFence(input)
if expected != actual {
t.Errorf(
"failed TransposeRailFence:\n\texpected: % x\n\t actual: % x",
"failed TransposeRailFence:\n\texpected: % q\n\t actual: % q",
expected,
actual,
)
@ -38,7 +38,7 @@ func TestTransposeRailFence(t *testing.T) {
actual = TransposeRailFence(input)
if expected != actual {
t.Errorf(
"failed TransposeRailFence:\n\texpected: % x\n\t actual: % x",
"failed TransposeRailFence:\n\texpected: % q\n\t actual: % q",
expected,
actual,
)
@ -51,7 +51,7 @@ func TestTransposeSplit(t *testing.T) {
actual := TransposeSplit(input)
if expected != actual {
t.Errorf(
"failed TransposeSplit:\n\texpected: % x\n\t actual: % x",
"failed TransposeSplit:\n\texpected: % q\n\t actual: % q",
expected,
actual,
)
@ -61,7 +61,7 @@ func TestTransposeSplit(t *testing.T) {
actual = TransposeSplit(input)
if expected != actual {
t.Errorf(
"failed TransposeSplit:\n\texpected: % x\n\t actual: % x",
"failed TransposeSplit:\n\texpected: % q\n\t actual: % q",
expected,
actual,
)
@ -71,7 +71,7 @@ func TestTransposeSplit(t *testing.T) {
actual = TransposeSplit(input)
if expected != actual {
t.Errorf(
"failed TransposeSplit:\n\texpected: % x\n\t actual: % x",
"failed TransposeSplit:\n\texpected: % q\n\t actual: % q",
expected,
actual,
)
@ -81,7 +81,7 @@ func TestTransposeSplit(t *testing.T) {
actual = TransposeSplit(input)
if expected != actual {
t.Errorf(
"failed TransposeSplit:\n\texpected: % x\n\t actual: % x",
"failed TransposeSplit:\n\texpected: % q\n\t actual: % q",
expected,
actual,
)
@ -91,7 +91,7 @@ func TestTransposeSplit(t *testing.T) {
actual = TransposeSplit(input)
if expected != actual {
t.Errorf(
"failed TransposeSplit:\n\texpected: % x\n\t actual: % x",
"failed TransposeSplit:\n\texpected: % q\n\t actual: % q",
expected,
actual,
)
@ -103,9 +103,52 @@ func TestTransposeRandom(t *testing.T) {
actual := TransposeSplit(input)
if input == actual {
t.Errorf(
"failed TransposeRandom:\n\texpected: something random\n\t actual: % x",
"failed TransposeRandom:\n\texpected: something random\n\t actual: % q",
input,
actual,
)
}
}
func TestDeTransposeSplit(t *testing.T) {
expected := "helloworld"
input := "hweolrllod"
actual := DeTransposeSplit(input)
if expected != actual {
t.Errorf(
"failed DeTransposeSplit:\n\texpected: % q\n\t actual: % q",
expected,
actual,
)
}
expected = "12"
input = "12"
actual = DeTransposeSplit(input)
if expected != actual {
t.Errorf(
"failed DeTransposeSplit:\n\texpected: % q\n\t actual: % q",
expected,
actual,
)
}
expected = "12345"
input = "13245"
actual = DeTransposeSplit(input)
if expected != actual {
t.Errorf(
"failed DeTransposeSplit:\n\texpected: % q\n\t actual: % q",
expected,
actual,
)
}
expected = "123"
input = "123"
actual = DeTransposeSplit(input)
if expected != actual {
t.Errorf(
"failed DeTransposeSplit:\n\texpected: % q\n\t actual: % q",
expected,
actual,
)
}
}