42 lines
1.5 KiB
Go
42 lines
1.5 KiB
Go
package runtime_test
|
|
|
|
import (
|
|
"fmt"
|
|
"testing"
|
|
)
|
|
|
|
func TestArray(t *testing.T) {
|
|
expect(t, `out = [1, 2 * 2, 3 + 3]`, ARR{1, 4, 6})
|
|
|
|
// array copy-by-reference
|
|
expect(t, `a1 := [1, 2, 3]; a2 := a1; a1[0] = 5; out = a2`, ARR{5, 2, 3})
|
|
expect(t, `func () { a1 := [1, 2, 3]; a2 := a1; a1[0] = 5; out = a2 }()`, ARR{5, 2, 3})
|
|
|
|
// index operator
|
|
arr := ARR{1, 2, 3, 4, 5, 6}
|
|
arrStr := `[1, 2, 3, 4, 5, 6]`
|
|
arrLen := 6
|
|
for idx := 0; idx < arrLen; idx++ {
|
|
expect(t, fmt.Sprintf("out = %s[%d]", arrStr, idx), arr[idx])
|
|
expect(t, fmt.Sprintf("out = %s[0 + %d]", arrStr, idx), arr[idx])
|
|
expect(t, fmt.Sprintf("out = %s[1 + %d - 1]", arrStr, idx), arr[idx])
|
|
expect(t, fmt.Sprintf("idx := %d; out = %s[idx]", idx, arrStr), arr[idx])
|
|
}
|
|
expectError(t, fmt.Sprintf("%s[%d]", arrStr, -1))
|
|
expectError(t, fmt.Sprintf("%s[%d]", arrStr, arrLen))
|
|
|
|
// slice operator
|
|
for low := 0; low < arrLen; low++ {
|
|
for high := low; high <= arrLen; high++ {
|
|
expect(t, fmt.Sprintf("out = %s[%d:%d]", arrStr, low, high), arr[low:high])
|
|
expect(t, fmt.Sprintf("out = %s[0 + %d : 0 + %d]", arrStr, low, high), arr[low:high])
|
|
expect(t, fmt.Sprintf("out = %s[1 + %d - 1 : 1 + %d - 1]", arrStr, low, high), arr[low:high])
|
|
expect(t, fmt.Sprintf("out = %s[:%d]", arrStr, high), arr[:high])
|
|
expect(t, fmt.Sprintf("out = %s[%d:]", arrStr, low), arr[low:])
|
|
expect(t, fmt.Sprintf("out = %s[:]", arrStr), arr[:])
|
|
}
|
|
}
|
|
expectError(t, fmt.Sprintf("%s[%d:]", arrStr, -1))
|
|
expectError(t, fmt.Sprintf("%s[:%d]", arrStr, arrLen+1))
|
|
expectError(t, fmt.Sprintf("%s[%d:%d]", arrStr, 2, 1))
|
|
}
|