assert_eq!(data.replace(|c| c == 'γ', "😺😺😺"), "abcdαβ😺😺😺δabcdαβ😺😺😺δ");
}
+// The current implementation of SliceIndex fails to handle methods
+// orthogonally from range types; therefore, it is worth testing
+// all of the indexing operations on each input.
mod slice_index {
// Test a slicing operation **that should succeed,**
// testing it on all of the indexing methods.
//
- // DO NOT use this in `should_panic` tests, unless you are testing the macro itself.
+ // This is not suitable for testing failure on invalid inputs.
macro_rules! assert_range_eq {
($s:expr, $range:expr, $expected:expr)
=> {
// because if it can't, then what are we even doing here?
//
// (Be aware this only demonstrates the ability to detect bugs
- // in the FIRST method it calls, as the macro is not designed
+ // in the FIRST method that panics, as the macro is not designed
// to be used in `should_panic`)
#[test]
#[should_panic(expected = "out of bounds")]
// and `None` test cases for get/get_mut.
macro_rules! panic_cases {
($(
- mod $case_name:ident {
- let DATA = $data:expr;
+ in mod $case_name:ident {
+ data: $data:expr;
// optional:
//
// straddles the boundary between valid and invalid.
// (such as the input `len..len`, which is just barely valid)
$(
- let GOOD_INPUT = $good:expr;
- let GOOD_OUTPUT = $output:expr;
+ good: data[$good:expr] == $output:expr;
)*
- let BAD_INPUT = $bad:expr;
- const EXPECT_MSG = $expect_msg:expr; // must be a literal
-
- !!generate_tests!!
+ bad: data[$bad:expr];
+ message: $expect_msg:expr; // must be a literal
}
)*) => {$(
mod $case_name {
}
panic_cases! {
- mod rangefrom_len {
- let DATA = "abcdef";
-
- let GOOD_INPUT = 6..;
- let GOOD_OUTPUT = "";
-
- let BAD_INPUT = 7..;
- const EXPECT_MSG = "out of bounds";
-
- !!generate_tests!!
+ in mod rangefrom_len {
+ data: "abcdef";
+ good: data[6..] == "";
+ bad: data[7..];
+ message: "out of bounds";
}
- mod rangeto_len {
- let DATA = "abcdef";
-
- let GOOD_INPUT = ..6;
- let GOOD_OUTPUT = "abcdef";
-
- let BAD_INPUT = ..7;
- const EXPECT_MSG = "out of bounds";
-
- !!generate_tests!!
+ in mod rangeto_len {
+ data: "abcdef";
+ good: data[..6] == "abcdef";
+ bad: data[..7];
+ message: "out of bounds";
}
- mod rangetoinclusive_len {
- let DATA = "abcdef";
-
- let GOOD_INPUT = ..=5;
- let GOOD_OUTPUT = "abcdef";
-
- let BAD_INPUT = ..=6;
- const EXPECT_MSG = "out of bounds";
-
- !!generate_tests!!
+ in mod rangetoinclusive_len {
+ data: "abcdef";
+ good: data[..=5] == "abcdef";
+ bad: data[..=6];
+ message: "out of bounds";
}
- mod range_len_len {
- let DATA = "abcdef";
-
- let GOOD_INPUT = 6..6;
- let GOOD_OUTPUT = "";
-
- let BAD_INPUT = 7..7;
- const EXPECT_MSG = "out of bounds";
-
- !!generate_tests!!
+ in mod range_len_len {
+ data: "abcdef";
+ good: data[6..6] == "";
+ bad: data[7..7];
+ message: "out of bounds";
}
- mod rangeinclusive_len_len {
- let DATA = "abcdef";
-
- let GOOD_INPUT = 6..=5;
- let GOOD_OUTPUT = "";
-
- let BAD_INPUT = 7..=6;
- const EXPECT_MSG = "out of bounds";
-
- !!generate_tests!!
+ in mod rangeinclusive_len_len {
+ data: "abcdef";
+ good: data[6..=5] == "";
+ bad: data[7..=6];
+ message: "out of bounds";
}
}
panic_cases! {
- mod range_neg_width {
- let DATA = "abcdef";
-
- let GOOD_INPUT = 4..4;
- let GOOD_OUTPUT = "";
-
- let BAD_INPUT = 4..3;
- const EXPECT_MSG = "begin <= end (4 <= 3)";
-
- !!generate_tests!!
+ in mod range_neg_width {
+ data: "abcdef";
+ good: data[4..4] == "";
+ bad: data[4..3];
+ message: "begin <= end (4 <= 3)";
}
- mod rangeinclusive_neg_width {
- let DATA = "abcdef";
-
- let GOOD_INPUT = 4..=3;
- let GOOD_OUTPUT = "";
-
- let BAD_INPUT = 4..=2;
- const EXPECT_MSG = "begin <= end (4 <= 3)";
-
- !!generate_tests!!
+ in mod rangeinclusive_neg_width {
+ data: "abcdef";
+ good: data[4..=3] == "";
+ bad: data[4..=2];
+ message: "begin <= end (4 <= 3)";
}
}
mod overflow {
panic_cases! {
-
- mod rangeinclusive {
- let DATA = "hello";
-
+ in mod rangeinclusive {
+ data: "hello";
// note: using 0 specifically ensures that the result of overflowing is 0..0,
// so that `get` doesn't simply return None for the wrong reason.
- let BAD_INPUT = 0..=usize::max_value();
- const EXPECT_MSG = "maximum usize";
-
- !!generate_tests!!
+ bad: data[0..=usize::max_value()];
+ message: "maximum usize";
}
- mod rangetoinclusive {
- let DATA = "hello";
-
- let BAD_INPUT = ..=usize::max_value();
- const EXPECT_MSG = "maximum usize";
-
- !!generate_tests!!
+ in mod rangetoinclusive {
+ data: "hello";
+ bad: data[..=usize::max_value()];
+ message: "maximum usize";
}
}
}
// because some of the logic may be duplicated as part of micro-optimizations
// to dodge unicode boundary checks on half-ranges.
panic_cases! {
- mod range_1 {
- let DATA = super::DATA;
-
- let BAD_INPUT = super::BAD_START..super::GOOD_END;
- const EXPECT_MSG =
+ in mod range_1 {
+ data: super::DATA;
+ bad: data[super::BAD_START..super::GOOD_END];
+ message:
"byte index 4 is not a char boundary; it is inside 'α' (bytes 3..5) of";
-
- !!generate_tests!!
}
- mod range_2 {
- let DATA = super::DATA;
-
- let BAD_INPUT = super::GOOD_START..super::BAD_END;
- const EXPECT_MSG =
+ in mod range_2 {
+ data: super::DATA;
+ bad: data[super::GOOD_START..super::BAD_END];
+ message:
"byte index 6 is not a char boundary; it is inside 'β' (bytes 5..7) of";
-
- !!generate_tests!!
}
- mod rangefrom {
- let DATA = super::DATA;
-
- let BAD_INPUT = super::BAD_START..;
- const EXPECT_MSG =
+ in mod rangefrom {
+ data: super::DATA;
+ bad: data[super::BAD_START..];
+ message:
"byte index 4 is not a char boundary; it is inside 'α' (bytes 3..5) of";
-
- !!generate_tests!!
}
- mod rangeto {
- let DATA = super::DATA;
-
- let BAD_INPUT = ..super::BAD_END;
- const EXPECT_MSG =
+ in mod rangeto {
+ data: super::DATA;
+ bad: data[..super::BAD_END];
+ message:
"byte index 6 is not a char boundary; it is inside 'β' (bytes 5..7) of";
-
- !!generate_tests!!
}
- mod rangeinclusive_1 {
- let DATA = super::DATA;
-
- let BAD_INPUT = super::BAD_START..=super::GOOD_END_INCL;
- const EXPECT_MSG =
+ in mod rangeinclusive_1 {
+ data: super::DATA;
+ bad: data[super::BAD_START..=super::GOOD_END_INCL];
+ message:
"byte index 4 is not a char boundary; it is inside 'α' (bytes 3..5) of";
-
- !!generate_tests!!
}
- mod rangeinclusive_2 {
- let DATA = super::DATA;
-
- let BAD_INPUT = super::GOOD_START..=super::BAD_END_INCL;
- const EXPECT_MSG =
+ in mod rangeinclusive_2 {
+ data: super::DATA;
+ bad: data[super::GOOD_START..=super::BAD_END_INCL];
+ message:
"byte index 6 is not a char boundary; it is inside 'β' (bytes 5..7) of";
-
- !!generate_tests!!
}
- mod rangetoinclusive {
- let DATA = super::DATA;
-
- let BAD_INPUT = ..=super::BAD_END_INCL;
- const EXPECT_MSG =
+ in mod rangetoinclusive {
+ data: super::DATA;
+ bad: data[..=super::BAD_END_INCL];
+ message:
"byte index 6 is not a char boundary; it is inside 'β' (bytes 5..7) of";
-
- !!generate_tests!!
}
}
}
projects / rust.git / commitdiff