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Changed order of arguments of many functions. Added test for nearest

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This commit is contained in:
btracey
2013-07-26 11:29:05 -07:00
parent 3e9dc87057
commit f6fd9bb947
2 changed files with 47 additions and 17 deletions
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2
examples_test.go
View File

@@ -90,7 +90,7 @@ func ExampleAddConst() {
s := []float64{1, -2, 3, -4}
c := 5.0
AddConst(s, c)
AddConst(c, s)
fmt.Println("s = ", s)
// Output:

62
floats_test.go
View File

@@ -56,7 +56,7 @@ func TestAddconst(t *testing.T) {
s := []float64{3, 4, 1, 7, 5}
c := 6.0
truth := []float64{9, 10, 7, 13, 11}
AddConst(s, c)
AddConst(c, s)
AreSlicesEqual(t, truth, s, "Wrong addition of constant")
}
@@ -67,7 +67,7 @@ func TestApply(t *testing.T) {
for i, val := range s {
truth[i] = math.Sin(val)
}
Apply(s, f)
Apply(f, s)
AreSlicesEqual(t, truth, s, "Wrong application of function")
}
@@ -75,7 +75,7 @@ func TestCount(t *testing.T) {
s := []float64{3, 4, 1, 7, 5}
f := func(v float64) bool { return v > 3.5 }
truth := 3
n := Count(s, f)
n := Count(f, s)
if n != truth {
t.Errorf("Wrong number of elements counted")
}
@@ -172,7 +172,7 @@ func TestFind(t *testing.T) {
allTrueInds := []int{1, 3, 4}
// Test finding first two elements
inds, err := Find(nil, 2, s, f)
inds, err := Find(nil, f, s, 2)
if err != nil {
t.Errorf("Find first two: Improper error return")
}
@@ -184,7 +184,7 @@ func TestFind(t *testing.T) {
// Test finding first two elements with non nil slice
inds = []int{1, 2, 3, 4, 5, 6}
inds, err = Find(inds, 2, s, f)
inds, err = Find(inds, f, s, 2)
if err != nil {
t.Errorf("Find first two non-nil: Improper error return")
}
@@ -194,7 +194,7 @@ func TestFind(t *testing.T) {
}
// Test finding too many elements
inds, err = Find(inds, 4, s, f)
inds, err = Find(inds, f, s, 4)
if err == nil {
t.Errorf("Request too many: No error returned")
}
@@ -204,7 +204,7 @@ func TestFind(t *testing.T) {
}
// Test finding all elements
inds, err = Find(nil, -1, s, f)
inds, err = Find(nil, f, s, -1)
if err != nil {
t.Errorf("Find all: Improper error returned")
}
@@ -283,9 +283,39 @@ func TestMin(t *testing.T) {
}
func TestNearest(t *testing.T) {
s := []float64{3, 5, 6.2, 6.2, 8}
ind := Nearest(2.0, s)
if
s := []float64{6.2, 3, 5, 6.2, 8}
ind := Nearest(s, 2.0)
if ind != 1 {
t.Errorf("Wrong index returned when value is less than all of elements")
}
ind = Nearest(s, 9.0)
if ind != 4 {
t.Errorf("Wrong index returned when value is greater than all of elements")
}
ind = Nearest(s, 3.1)
if ind != 1 {
t.Errorf("Wrong index returned when value is greater than closest element")
}
ind = Nearest(s, 3.1)
if ind != 1 {
t.Errorf("Wrong index returned when value is greater than closest element")
}
ind = Nearest(s, 2.9)
if ind != 1 {
t.Errorf("Wrong index returned when value is less than closest element")
}
ind = Nearest(s, 3)
if ind != 1 {
t.Errorf("Wrong index returned when value is equal to element")
}
ind = Nearest(s, 6.2)
if ind != 0 {
t.Errorf("Wrong index returned when value is equal to several elements")
}
ind = Nearest(s, 4)
if ind != 1 {
t.Errorf("Wrong index returned when value is exactly between two closest elements")
}
}
func TestNorm(t *testing.T) {
@@ -333,7 +363,7 @@ func TestScale(t *testing.T) {
s := []float64{3, 4, 1, 7, 5}
c := 5.0
truth := []float64{15, 20, 5, 35, 25}
Scale(s, c)
Scale(c, s)
AreSlicesEqual(t, truth, s, "Bad scaling")
}
@@ -366,21 +396,21 @@ func TestSub(t *testing.T) {
}
}
func TestSubDst(t *testing.T) {
func TestSubTo(t *testing.T) {
s := []float64{3, 4, 1, 7, 5}
v := []float64{1, 2, 3, 4, 5}
truth := []float64{2, 2, -2, 3, 0}
dst := make([]float64, len(s))
SubDst(dst, s, v)
SubTo(dst, s, v)
AreSlicesEqual(t, truth, dst, "Bad subtract")
// Test that all mismatch combinations panic
if !Panics(func() { SubDst(make([]float64, 2), make([]float64, 3), make([]float64, 3)) }) {
if !Panics(func() { SubTo(make([]float64, 2), make([]float64, 3), make([]float64, 3)) }) {
t.Errorf("Did not panic with dst different length")
}
if !Panics(func() { SubDst(make([]float64, 3), make([]float64, 2), make([]float64, 3)) }) {
if !Panics(func() { SubTo(make([]float64, 3), make([]float64, 2), make([]float64, 3)) }) {
t.Errorf("Did not panic with subtractor different length")
}
if !Panics(func() { SubDst(make([]float64, 3), make([]float64, 3), make([]float64, 2)) }) {
if !Panics(func() { SubTo(make([]float64, 3), make([]float64, 3), make([]float64, 2)) }) {
t.Errorf("Did not panic with subtractee different length")
}
}