Increase consistency with what cargo new --lib generates

listings/ch11-writing-automated-tests/listing-11-07/src/lib.rs

@@ -1,4 +1,4 @@
-pub fn add_two(a: i32) -> i32 {
+pub fn add_two(a: usize) -> usize {
     a + 2
 }
 
@@ -8,6 +8,7 @@ mod tests {
 
     #[test]
     fn it_adds_two() {
-        assert_eq!(4, add_two(2));
+        let result = add_two(2);
+        assert_eq!(result, 4);
     }
 }

listings/ch11-writing-automated-tests/listing-11-10/output.txt

@@ -13,8 +13,8 @@ failures:
 I got the value 8
 thread 'tests::this_test_will_fail' panicked at src/lib.rs:19:9:
 assertion `left == right` failed
-  left: 5
- right: 10
+  left: 10
+ right: 5
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 
 

listings/ch11-writing-automated-tests/listing-11-10/src/lib.rs

@@ -10,12 +10,12 @@ mod tests {
     #[test]
     fn this_test_will_pass() {
         let value = prints_and_returns_10(4);
-        assert_eq!(10, value);
+        assert_eq!(value, 10);
     }
 
     #[test]
     fn this_test_will_fail() {
         let value = prints_and_returns_10(8);
-        assert_eq!(5, value);
+        assert_eq!(value, 5);
     }
 }

listings/ch11-writing-automated-tests/listing-11-11/src/lib.rs

@@ -1,4 +1,4 @@
-pub fn add_two(a: i32) -> i32 {
+pub fn add_two(a: usize) -> usize {
     a + 2
 }
 
@@ -8,16 +8,19 @@ mod tests {
 
     #[test]
     fn add_two_and_two() {
-        assert_eq!(4, add_two(2));
+        let result = add_two(2);
+        assert_eq!(result, 4);
     }
 
     #[test]
     fn add_three_and_two() {
-        assert_eq!(5, add_two(3));
+        let result = add_two(3);
+        assert_eq!(result, 5);
     }
 
     #[test]
     fn one_hundred() {
-        assert_eq!(102, add_two(100));
+        let result = add_two(100);
+        assert_eq!(result, 102);
     }
 }

listings/ch11-writing-automated-tests/listing-11-12/src/lib.rs

@@ -1,9 +1,9 @@
-pub fn add_two(a: i32) -> i32 {
+pub fn add_two(a: usize) -> usize {
     internal_adder(a, 2)
 }
 
-fn internal_adder(a: i32, b: i32) -> i32 {
-    a + b
+fn internal_adder(left: usize, right: usize) -> usize {
+    left + right
 }
 
 #[cfg(test)]
@@ -12,6 +12,7 @@ mod tests {
 
     #[test]
     fn internal() {
-        assert_eq!(4, internal_adder(2, 2));
+        let result = internal_adder(2, 2);
+        assert_eq!(result, 4);
     }
 }

listings/ch11-writing-automated-tests/listing-11-13/src/lib.rs

@@ -1,9 +1,9 @@
-pub fn add_two(a: i32) -> i32 {
+pub fn add_two(a: usize) -> usize {
     internal_adder(a, 2)
 }
 
-fn internal_adder(a: i32, b: i32) -> i32 {
-    a + b
+fn internal_adder(left: usize, right: usize) -> usize {
+    left + right
 }
 
 #[cfg(test)]
@@ -12,6 +12,7 @@ mod tests {
 
     #[test]
     fn internal() {
-        assert_eq!(4, internal_adder(2, 2));
+        let result = internal_adder(2, 2);
+        assert_eq!(result, 4);
     }
 }

listings/ch11-writing-automated-tests/listing-11-13/tests/integration_test.rs

@@ -2,5 +2,6 @@ use adder::add_two;
 
 #[test]
 fn it_adds_two() {
-    assert_eq!(4, add_two(2));
+    let result = add_two(2);
+    assert_eq!(result, 4);
 }

listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/output.txt

@@ -9,7 +9,7 @@ test tests::it_adds_two ... FAILED
 failures:
 
 ---- tests::it_adds_two stdout ----
-thread 'tests::it_adds_two' panicked at src/lib.rs:11:9:
+thread 'tests::it_adds_two' panicked at src/lib.rs:12:9:
 assertion `left == right` failed
   left: 5
  right: 4

listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/src/lib.rs

@@ -1,5 +1,5 @@
 // ANCHOR: here
-pub fn add_two(a: i32) -> i32 {
+pub fn add_two(a: usize) -> usize {
     a + 3
 }
 // ANCHOR_END: here
@@ -10,6 +10,7 @@ mod tests {
 
     #[test]
     fn it_adds_two() {
-        assert_eq!(add_two(2), 4);
+        let result = add_two(2);
+        assert_eq!(result, 4);
     }
 }

listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/src/lib.rs

@@ -12,8 +12,7 @@ mod tests {
         let result = greeting("Carol");
         assert!(
             result.contains("Carol"),
-            "Greeting did not contain name, value was `{}`",
-            result
+            "Greeting did not contain name, value was `{result}`"
         );
     }
     // ANCHOR_END: here

listings/ch11-writing-automated-tests/no-listing-10-result-in-tests/src/lib.rs

@@ -1,11 +1,21 @@
+pub fn add(left: usize, right: usize) -> usize {
+    left + right
+}
+
 #[cfg(test)]
 mod tests {
+    use super::*;
+
+    // ANCHOR: here
     #[test]
     fn it_works() -> Result<(), String> {
-        if 2 + 2 == 4 {
+        let result = add(2, 2);
+
+        if result == 4 {
             Ok(())
         } else {
             Err(String::from("two plus two does not equal four"))
         }
     }
+    // ANCHOR_END: here
 }

listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/output.txt

@@ -4,8 +4,8 @@ $ cargo test
      Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
 
 running 2 tests
-test expensive_test ... ignored
-test it_works ... ok
+test tests::expensive_test ... ignored
+test tests::it_works ... ok
 
 test result: ok. 1 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.00s
 

listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/src/lib.rs

@@ -1,10 +1,22 @@
-#[test]
-fn it_works() {
-    assert_eq!(2 + 2, 4);
+pub fn add(left: usize, right: usize) -> usize {
+    left + right
 }
 
-#[test]
-#[ignore]
-fn expensive_test() {
-    // code that takes an hour to run
+// ANCHOR: here
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+
+    #[test]
+    #[ignore]
+    fn expensive_test() {
+        // code that takes an hour to run
+    }
 }
+// ANCHOR_END: here

listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/src/lib.rs

@@ -1,9 +1,9 @@
-pub fn add_two(a: i32) -> i32 {
+pub fn add_two(a: usize) -> usize {
     internal_adder(a, 2)
 }
 
-fn internal_adder(a: i32, b: i32) -> i32 {
-    a + b
+fn internal_adder(left: usize, right: usize) -> usize {
+    left + right
 }
 
 #[cfg(test)]
@@ -12,6 +12,7 @@ mod tests {
 
     #[test]
     fn internal() {
-        assert_eq!(4, internal_adder(2, 2));
+        let result = internal_adder(2, 2);
+        assert_eq!(result, 4);
     }
 }

listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/tests/integration_test.rs

@@ -1,6 +1,7 @@
-use adder;
+use adder::add_two;
 
 #[test]
 fn it_adds_two() {
-    assert_eq!(4, adder::add_two(2));
+    let result = add_two(2);
+    assert_eq!(result, 4);
 }

listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/src/lib.rs

@@ -1,9 +1,9 @@
-pub fn add_two(a: i32) -> i32 {
+pub fn add_two(a: usize) -> usize {
     internal_adder(a, 2)
 }
 
-fn internal_adder(a: i32, b: i32) -> i32 {
-    a + b
+fn internal_adder(left: usize, right: usize) -> usize {
+    left + right
 }
 
 #[cfg(test)]
@@ -12,6 +12,7 @@ mod tests {
 
     #[test]
     fn internal() {
-        assert_eq!(4, internal_adder(2, 2));
+        let result = internal_adder(2, 2);
+        assert_eq!(result, 4);
     }
 }

listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/tests/integration_test.rs

@@ -1,9 +1,11 @@
-use adder;
+use adder::add_two;
 
 mod common;
 
 #[test]
 fn it_adds_two() {
     common::setup();
-    assert_eq!(4, adder::add_two(2));
+
+    let result = add_two(2);
+    assert_eq!(result, 4);
 }

listings/ch11-writing-automated-tests/output-only-05-single-integration/src/lib.rs

@@ -1,9 +1,9 @@
-pub fn add_two(a: i32) -> i32 {
+pub fn add_two(a: usize) -> usize {
     internal_adder(a, 2)
 }
 
-fn internal_adder(a: i32, b: i32) -> i32 {
-    a + b
+fn internal_adder(left: usize, right: usize) -> usize {
+    left + right
 }
 
 #[cfg(test)]
@@ -12,6 +12,7 @@ mod tests {
 
     #[test]
     fn internal() {
-        assert_eq!(4, internal_adder(2, 2));
+        let result = internal_adder(2, 2);
+        assert_eq!(result, 4);
     }
 }

listings/ch11-writing-automated-tests/output-only-05-single-integration/tests/integration_test.rs

@@ -1,6 +1,7 @@
-use adder;
+use adder::add_two;
 
 #[test]
 fn it_adds_two() {
-    assert_eq!(4, adder::add_two(2));
+    let result = add_two(2);
+    assert_eq!(result, 4);
 }