75 lines
1.4 KiB
Zig
75 lines
1.4 KiB
Zig
const expect = @import("std").testing.expect;
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const FileOpenError = error{
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AccessDenied,
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OutOfMemory,
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FileNotFound,
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};
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const AllocationError = error{OutOfMemory};
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test "coerce error from a subset to a superset" {
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const err: FileOpenError = AllocationError.OutOfMemory;
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try expect(err == FileOpenError.OutOfMemory);
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}
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test "error union" {
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const maybe_error: AllocationError!u16 = 10;
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const no_error = maybe_error catch 0;
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try expect(@TypeOf(no_error) == u16);
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try expect(no_error == 10);
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}
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fn failingFunction() error{Oops}!void {
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return error.Oops;
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}
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test "returning an error" {
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failingFunction() catch |err| {
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try expect(err == error.Oops);
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return;
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};
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}
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fn failFn() error{Oops}!i32 {
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try failingFunction();
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return 12;
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}
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test "try" {
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const v = failFn() catch |err| {
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try expect(err == error.Oops);
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return;
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};
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try expect(v == 12);
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}
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var problems: u32 = 98;
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fn failFnCounter() error{Oops}!void {
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errdefer problems += 1;
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try failingFunction();
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}
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test "errdefer" {
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failFnCounter() catch |err| {
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try expect(err == error.Oops);
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try expect(problems == 99);
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return;
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};
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}
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fn createFile() !void {
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return error.AccessDenied;
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}
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test "inferred error set" {
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const x: error{AccessDenied}!void = createFile();
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_ = x catch {};
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}
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const A = error{ NotDir, PathNotFound };
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const B = error{ OutOfMemory, PathNotFound };
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const C = A || B;
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