added psyctext

rust/tests/test_text.rs

@@ -0,0 +1,62 @@
+extern crate psyc;
+
+use psyc::*;
+
+#[test]
+fn test_substitute() {
+    let template = b"Your hello is [_hello]";
+    let mut t = Text::new(template);
+
+    let mut buffer = vec![0; 100];
+
+    let result = t.substitute_variables(|name| {
+        println!("in callback, name: {:?}", name);
+        match name {
+            b"_hello" => Some(b"hi"),
+            _ => None
+        }},
+        &mut buffer);
+
+    assert_eq!(result, SubstitutionResult::Complete {bytes_written: 16});
+    assert_eq!(&buffer[.. 16], b"Your hello is hi");
+}
+
+#[test]
+fn test_empty() {
+    let mut t = Text::new(b"");
+
+    let mut buffer = Vec::new();
+
+    assert_eq!(t.substitute_variables(|_name| {Some(b"hi")}, &mut buffer),
+               SubstitutionResult::NoSubstitution);
+}
+
+#[test]
+fn test_incomplete() {
+    let template = b"Your hello is [_hello]";
+    let mut t = Text::new(template);
+
+    let mut buffer = vec![0; 10];
+
+    assert_eq!(t.substitute_variables(|_name| {Some(b"hi")}, &mut buffer),
+               SubstitutionResult::Incomplete {bytes_written: 0});
+
+    buffer.resize(15, 0);
+
+    assert_eq!(t.substitute_variables(|_name| {Some(b"hi")}, &mut buffer),
+               SubstitutionResult::Incomplete {bytes_written: 14});
+
+    buffer.resize(16, 0);
+    assert_eq!(t.substitute_variables(|_name| {Some(b"hi")}, &mut buffer[14 ..]),
+               SubstitutionResult::Complete {bytes_written: 2});
+
+    assert_eq!(&buffer, b"Your hello is hi");
+}
+
+#[test]
+fn test_template() {
+    let template = Text::template(PsycMethod::PSYC_MC_REQUEST_CONTEXT_ENTER);
+    let expected: &'static [u8] = b"[_source] asks for your permission to enter [_context]";
+
+    assert_eq!(template, expected);
+}