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add assert comments
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This commit is contained in:
Adam Jeniski 2025-11-04 18:06:17 -10:00
parent df56597332
commit 72da3ec820
1 changed files with 11 additions and 8 deletions
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19
list/list_test.go
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@ -24,7 +24,8 @@ func intListGen() *rapid.Generator[IList] {
func TestConjIncreasesLength(t *testing.T) {
rapid.Check(t, func(t *rapid.T) {
myList := intListGen().Draw(t, "myList")
assert.Equal(t, myList.Len()+1, myList.Conj(42).Len())
newElem := rapid.Int().Draw(t, "newElem")
assert.Equal(t, myList.Len()+1, myList.Conj(newElem).Len(), "conj increases length")
})
}
@ -32,32 +33,34 @@ func TestRestDecreasesLength(t *testing.T) {
rapid.Check(t, func(t *rapid.T) {
myList := intListGen().Draw(t, "myList")
if myList.IsEmpty() {
assert.Equal(t, 0, myList.Rest().Len())
assert.Equal(t, myList.Len(), myList.Rest().Len(), "rest does not change length for empty list")
} else {
assert.Equal(t, myList.Len()-1, myList.Rest().Len())
assert.Equal(t, myList.Len()-1, myList.Rest().Len(), "rest decreases length of non-empty list")
}
})
}
func TestFirstIsNilOnlyWhenEmpty(t *testing.T) {
assert.Equal(t, 1, New(3).Conj(2).Conj(1).First())
rapid.Check(t, func(t *rapid.T) {
myList := intListGen().Draw(t, "myList")
assert.Equal(t, myList.IsEmpty(), myList.First() == nil)
assert.Equal(t, myList.IsEmpty(), myList.First() == nil, "first is nil only when list is empty")
})
}
func TestStringifyIntList(t *testing.T) {
assert.Equal(t, "(1 2 3)", New(3).Conj(2).Conj(1).String())
rapid.Check(t, func(t *rapid.T) {
myList := intListGen().Draw(t, "myList")
s := myList.String()
r := regexp.MustCompile(`\(.*\)`)
assert.Equal(t, true, r.Match([]byte(s)))
r := regexp.MustCompile(`^\([\d\s-]*\)$`)
assert.Equal(t, true, r.Match([]byte(s)), s + " looks like a string")
if !myList.IsEmpty() {
assert.Equal(t, myList.Len(), strings.Count(s, " ")+1)
assert.Equal(t, myList.Len(), strings.Count(s, " ")+1, "number of spaces in string should match count of elements")
} else {
assert.Equal(t, 0, strings.Count(s, " "))
assert.Equal(t, 0, strings.Count(s, " "), "no spaces in string for empty list")
}
})
}