X-Git-Url: https://piware.de/gitweb/?p=learn-rust.git;a=blobdiff_plain;f=concepts%2Ftests%2Ftest_lib.rs;fp=concepts%2Ftests%2Ftest_lib.rs;h=af9bbe25b980e3372f1232e43ccea731b0536da2;hp=0000000000000000000000000000000000000000;hb=b653e9fe9d8492f2d4b5419721f7e00b392055f9;hpb=8c240f514e17c9a935f5f392e6a87779ae1c09e8

diff --git a/concepts/tests/test_lib.rs b/concepts/tests/test_lib.rs
new file mode 100644
index 0000000..af9bbe2
--- /dev/null
+++ b/concepts/tests/test_lib.rs
@@ -0,0 +1,51 @@
+#[macro_use]
+extern crate global_counter;
+
+use learning::*;
+
+#[test]
+fn test_longest() {
+    assert_eq!(longest("abc", "de"), "abc");
+    assert_eq!(longest("abc", "def"), "def");
+    assert_eq!(longest("abc", "defg"), "defg");
+}
+
+#[test]
+fn test_cacher_int_int() {
+    global_default_counter!(CALLED, u32);
+    let mut cacher = Cacher::new(|x| {
+        CALLED.inc();
+        2 * x
+    });
+    assert_eq!(cacher.value(1), 2);
+    assert_eq!(CALLED.get_cloned(), 1);
+    // second time cached
+    assert_eq!(cacher.value(1), 2);
+    assert_eq!(CALLED.get_cloned(), 1);
+    // re-evaluated for new value
+    assert_eq!(cacher.value(-2), -4);
+    assert_eq!(CALLED.get_cloned(), 2);
+    // old arg still cached
+    assert_eq!(cacher.value(1), 2);
+    assert_eq!(CALLED.get_cloned(), 2);
+}
+
+#[test]
+fn test_cacher_str_usize() {
+    global_default_counter!(CALLED, u32);
+    let mut cacher = Cacher::new(|x: &str| {
+        CALLED.inc();
+        x.len()
+    });
+    assert_eq!(cacher.value("abc"), 3);
+    assert_eq!(CALLED.get_cloned(), 1);
+    // second time cached
+    assert_eq!(cacher.value("abc"), 3);
+    assert_eq!(CALLED.get_cloned(), 1);
+    // re-evaluated for new value
+    assert_eq!(cacher.value("defg"), 4);
+    assert_eq!(CALLED.get_cloned(), 2);
+    // old arg still cached
+    assert_eq!(cacher.value("abc"), 3);
+    assert_eq!(CALLED.get_cloned(), 2);
+}