fix(layout): total layout percent 100 validation (#57)

* Fix for issue #52

* Added missing fixtures.

* Added missing validation.

* Moved layout creation and validation to the Layout struct.

* Ran cargo fmt.

* Added creation of tmp folder if needed.

* Code review edit.

* Code review edit.

* Fancied code up.

* PR request change.

* PR code review.

* Merge from upstream/main.

* Merge from upstream/main.

3 files changed, 74 insertions, 1 deletions

diff --git a/src/tests/fixtures/layouts/parts-total-less-than-100-percent.yaml b/src/tests/fixtures/layouts/parts-total-less-than-100-percent.yaml
new file mode 100644
index 00000000..e1a1a607
--- /dev/null
+++ b/src/tests/fixtures/layouts/parts-total-less-than-100-percent.yaml
@@ -0,0 +1,16 @@
+---
+    direction: Horizontal
+    parts:
+      - direction: Vertical
+        parts:
+          - direction: Horizontal
+            split_size:
+              Percent: 20
+          - direction: Horizontal
+            split_size:
+              Percent: 50
+        split_size:
+          Percent: 80
+      - direction: Vertical
+        split_size:
+          Percent: 20
diff --git a/src/tests/fixtures/layouts/parts-total-more-than-100-percent.yaml b/src/tests/fixtures/layouts/parts-total-more-than-100-percent.yaml
new file mode 100644
index 00000000..33d94225
--- /dev/null
+++ b/src/tests/fixtures/layouts/parts-total-more-than-100-percent.yaml
@@ -0,0 +1,16 @@
+---
+    direction: Horizontal
+    parts:
+      - direction: Vertical
+        parts:
+          - direction: Horizontal
+            split_size:
+              Percent: 20
+          - direction: Horizontal
+            split_size:
+              Percent: 90
+        split_size:
+          Percent: 80
+      - direction: Vertical
+        split_size:
+          Percent: 20
diff --git a/src/tests/integration/layouts.rs b/src/tests/integration/layouts.rs
index 9781336e..cef96d87 100644
--- a/src/tests/integration/layouts.rs
+++ b/src/tests/integration/layouts.rs
@@ -1,4 +1,5 @@
 use ::insta::assert_snapshot;
+use std::path::PathBuf;
 
 use crate::terminal_pane::PositionAndSize;
 use crate::tests::fakes::FakeInputOutput;
@@ -20,11 +21,11 @@ pub fn accepts_basic_layout() {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[COMMAND_TOGGLE, COMMAND_TOGGLE, QUIT]);
-    use std::path::PathBuf;
     let mut opts = Opt::default();
     opts.layout = Some(PathBuf::from(
         "src/tests/fixtures/layouts/three-panes-with-nesting.yaml",
     ));
+
     start(Box::new(fake_input_output.clone()), opts);
     let output_frames = fake_input_output
         .stdout_writer
@@ -49,3 +50,43 @@ pub fn accepts_basic_layout() {
     assert_snapshot!(next_to_last_snapshot);
     assert_snapshot!(last_snapshot);
 }
+
+#[test]
+#[should_panic(expected = "The total percent for each part should equal 100.")]
+pub fn should_throw_for_more_than_100_percent_total() {
+    let fake_win_size = PositionAndSize {
+        columns: 121,
+        rows: 20,
+        x: 0,
+        y: 0,
+    };
+    let mut fake_input_output = get_fake_os_input(&fake_win_size);
+    fake_input_output.add_terminal_input(&[QUIT]);
+
+    let mut opts = Opt::default();
+    opts.layout = Some(PathBuf::from(
+        "src/tests/fixtures/layouts/parts-total-more-than-100-percent.yaml",
+    ));
+
+    start(Box::new(fake_input_output.clone()), opts);
+}
+
+#[test]
+#[should_panic(expected = "The total percent for each part should equal 100.")]
+pub fn should_throw_for_less_than_100_percent_total() {
+    let fake_win_size = PositionAndSize {
+        columns: 121,
+        rows: 20,
+        x: 0,
+        y: 0,
+    };
+    let mut fake_input_output = get_fake_os_input(&fake_win_size);
+    fake_input_output.add_terminal_input(&[QUIT]);
+
+    let mut opts = Opt::default();
+    opts.layout = Some(PathBuf::from(
+        "src/tests/fixtures/layouts/parts-total-less-than-100-percent.yaml",
+    ));
+
+    start(Box::new(fake_input_output.clone()), opts);
+}