Separate libsyntax_ext module

1 files changed, 151 insertions, 0 deletions

diff --git a/src/libsyntax_ext/format_foreign/printf/tests.rs b/src/libsyntax_ext/format_foreign/printf/tests.rs
new file mode 100644
index 00000000000..87021f1ef5a
--- /dev/null
+++ b/src/libsyntax_ext/format_foreign/printf/tests.rs
@@ -0,0 +1,151 @@
+use super::{
+    Format as F,
+    Num as N,
+    Substitution as S,
+    iter_subs,
+    parse_next_substitution as pns,
+};
+
+macro_rules! assert_eq_pnsat {
+    ($lhs:expr, $rhs:expr) => {
+        assert_eq!(
+            pns($lhs).and_then(|(s, _)| s.translate()),
+            $rhs.map(<String as From<&str>>::from)
+        )
+    };
+}
+
+#[test]
+fn test_escape() {
+    assert_eq!(pns("has no escapes"), None);
+    assert_eq!(pns("has no escapes, either %"), None);
+    assert_eq!(pns("*so* has a %% escape"), Some((S::Escape," escape")));
+    assert_eq!(pns("%% leading escape"), Some((S::Escape, " leading escape")));
+    assert_eq!(pns("trailing escape %%"), Some((S::Escape, "")));
+}
+
+#[test]
+fn test_parse() {
+    macro_rules! assert_pns_eq_sub {
+        ($in_:expr, {
+            $param:expr, $flags:expr,
+            $width:expr, $prec:expr, $len:expr, $type_:expr,
+            $pos:expr,
+        }) => {
+            assert_eq!(
+                pns(concat!($in_, "!")),
+                Some((
+                    S::Format(F {
+                        span: $in_,
+                        parameter: $param,
+                        flags: $flags,
+                        width: $width,
+                        precision: $prec,
+                        length: $len,
+                        type_: $type_,
+                        position: syntax_pos::InnerSpan::new($pos.0, $pos.1),
+                    }),
+                    "!"
+                ))
+            )
+        };
+    }
+
+    assert_pns_eq_sub!("%!",
+        { None, "", None, None, None, "!", (0, 2), });
+    assert_pns_eq_sub!("%c",
+        { None, "", None, None, None, "c", (0, 2), });
+    assert_pns_eq_sub!("%s",
+        { None, "", None, None, None, "s", (0, 2), });
+    assert_pns_eq_sub!("%06d",
+        { None, "0", Some(N::Num(6)), None, None, "d", (0, 4), });
+    assert_pns_eq_sub!("%4.2f",
+        { None, "", Some(N::Num(4)), Some(N::Num(2)), None, "f", (0, 5), });
+    assert_pns_eq_sub!("%#x",
+        { None, "#", None, None, None, "x", (0, 3), });
+    assert_pns_eq_sub!("%-10s",
+        { None, "-", Some(N::Num(10)), None, None, "s", (0, 5), });
+    assert_pns_eq_sub!("%*s",
+        { None, "", Some(N::Next), None, None, "s", (0, 3), });
+    assert_pns_eq_sub!("%-10.*s",
+        { None, "-", Some(N::Num(10)), Some(N::Next), None, "s", (0, 7), });
+    assert_pns_eq_sub!("%-*.*s",
+        { None, "-", Some(N::Next), Some(N::Next), None, "s", (0, 6), });
+    assert_pns_eq_sub!("%.6i",
+        { None, "", None, Some(N::Num(6)), None, "i", (0, 4), });
+    assert_pns_eq_sub!("%+i",
+        { None, "+", None, None, None, "i", (0, 3), });
+    assert_pns_eq_sub!("%08X",
+        { None, "0", Some(N::Num(8)), None, None, "X", (0, 4), });
+    assert_pns_eq_sub!("%lu",
+        { None, "", None, None, Some("l"), "u", (0, 3), });
+    assert_pns_eq_sub!("%Iu",
+        { None, "", None, None, Some("I"), "u", (0, 3), });
+    assert_pns_eq_sub!("%I32u",
+        { None, "", None, None, Some("I32"), "u", (0, 5), });
+    assert_pns_eq_sub!("%I64u",
+        { None, "", None, None, Some("I64"), "u", (0, 5), });
+    assert_pns_eq_sub!("%'d",
+        { None, "'", None, None, None, "d", (0, 3), });
+    assert_pns_eq_sub!("%10s",
+        { None, "", Some(N::Num(10)), None, None, "s", (0, 4), });
+    assert_pns_eq_sub!("%-10.10s",
+        { None, "-", Some(N::Num(10)), Some(N::Num(10)), None, "s", (0, 8), });
+    assert_pns_eq_sub!("%1$d",
+        { Some(1), "", None, None, None, "d", (0, 4), });
+    assert_pns_eq_sub!("%2$.*3$d",
+        { Some(2), "", None, Some(N::Arg(3)), None, "d", (0, 8), });
+    assert_pns_eq_sub!("%1$*2$.*3$d",
+        { Some(1), "", Some(N::Arg(2)), Some(N::Arg(3)), None, "d", (0, 11), });
+    assert_pns_eq_sub!("%-8ld",
+        { None, "-", Some(N::Num(8)), None, Some("l"), "d", (0, 5), });
+}
+
+#[test]
+fn test_iter() {
+    let s = "The %d'th word %% is: `%.*s` %!\n";
+    let subs: Vec<_> = iter_subs(s, 0).map(|sub| sub.translate()).collect();
+    assert_eq!(
+        subs.iter().map(|ms| ms.as_ref().map(|s| &s[..])).collect::<Vec<_>>(),
+        vec![Some("{}"), None, Some("{:.*}"), None]
+    );
+}
+
+/// Checks that the translations are what we expect.
+#[test]
+fn test_translation() {
+    assert_eq_pnsat!("%c", Some("{}"));
+    assert_eq_pnsat!("%d", Some("{}"));
+    assert_eq_pnsat!("%u", Some("{}"));
+    assert_eq_pnsat!("%x", Some("{:x}"));
+    assert_eq_pnsat!("%X", Some("{:X}"));
+    assert_eq_pnsat!("%e", Some("{:e}"));
+    assert_eq_pnsat!("%E", Some("{:E}"));
+    assert_eq_pnsat!("%f", Some("{}"));
+    assert_eq_pnsat!("%g", Some("{:e}"));
+    assert_eq_pnsat!("%G", Some("{:E}"));
+    assert_eq_pnsat!("%s", Some("{}"));
+    assert_eq_pnsat!("%p", Some("{:p}"));
+
+    assert_eq_pnsat!("%06d",        Some("{:06}"));
+    assert_eq_pnsat!("%4.2f",       Some("{:4.2}"));
+    assert_eq_pnsat!("%#x",         Some("{:#x}"));
+    assert_eq_pnsat!("%-10s",       Some("{:<10}"));
+    assert_eq_pnsat!("%*s",         None);
+    assert_eq_pnsat!("%-10.*s",     Some("{:<10.*}"));
+    assert_eq_pnsat!("%-*.*s",      None);
+    assert_eq_pnsat!("%.6i",        Some("{:06}"));
+    assert_eq_pnsat!("%+i",         Some("{:+}"));
+    assert_eq_pnsat!("%08X",        Some("{:08X}"));
+    assert_eq_pnsat!("%lu",         Some("{}"));
+    assert_eq_pnsat!("%Iu",         Some("{}"));
+    assert_eq_pnsat!("%I32u",       Some("{}"));
+    assert_eq_pnsat!("%I64u",       Some("{}"));
+    assert_eq_pnsat!("%'d",         None);
+    assert_eq_pnsat!("%10s",        Some("{:>10}"));
+    assert_eq_pnsat!("%-10.10s",    Some("{:<10.10}"));
+    assert_eq_pnsat!("%1$d",        Some("{0}"));
+    assert_eq_pnsat!("%2$.*3$d",    Some("{1:02$}"));
+    assert_eq_pnsat!("%1$*2$.*3$s", Some("{0:>1$.2$}"));
+    assert_eq_pnsat!("%-8ld",       Some("{:<8}"));
+}