From dde4bc79203cfb375d46ac5ebadd64aa4edc6b8d Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Sat, 14 Oct 2023 14:30:24 -0400
Subject: [PATCH] Add code for structured printing of test results.

---
 src/bin_foreign_document_test.rs | 148 ++++++++++++++++++++++++++++++-
 1 file changed, 146 insertions(+), 2 deletions(-)

diff --git a/src/bin_foreign_document_test.rs b/src/bin_foreign_document_test.rs
index c4d809b..f6018b9 100644
--- a/src/bin_foreign_document_test.rs
+++ b/src/bin_foreign_document_test.rs
@@ -6,7 +6,6 @@ use std::path::PathBuf;
 
 use futures::future::BoxFuture;
 use futures::future::FutureExt;
-use organic::compare::run_anonymous_compare;
 use organic::compare::run_compare_on_file;
 use tokio::sync::Semaphore;
 use tokio::task::JoinError;
@@ -53,7 +52,7 @@ async fn main_body() -> Result<(), Box<dyn std::error::Error>> {
     let running_tests: Vec<_> = layer.map(|c| tokio::spawn(c.run_test())).collect();
     for test in running_tests.into_iter() {
         let test_result = test.await??;
-        println!("{:?}", test_result);
+        test_result.print();
     }
 
     Ok(())
@@ -187,3 +186,148 @@ impl TestLayer {
         })
     }
 }
+
+impl TestResult {
+    pub fn print(&self) {
+        self.print_indented(0);
+    }
+
+    fn print_indented(&self, indentation: usize) {
+        match self {
+            TestResult::ResultLayer(result) => result.print_indented(indentation),
+            TestResult::SingleFileResult(result) => result.print_indented(indentation),
+        }
+    }
+
+    fn has_bad_children(&self) -> bool {
+        match self {
+            TestResult::ResultLayer(result) => result.has_bad_children(),
+            TestResult::SingleFileResult(result) => result.has_bad_children(),
+        }
+    }
+
+    fn is_immediately_bad(&self) -> bool {
+        match self {
+            TestResult::ResultLayer(result) => result.is_immediately_bad(),
+            TestResult::SingleFileResult(result) => result.is_immediately_bad(),
+        }
+    }
+
+    pub(crate) fn foreground_color(red: u8, green: u8, blue: u8) -> String {
+        if TestResult::should_use_color() {
+            format!(
+                "\x1b[38;2;{red};{green};{blue}m",
+                red = red,
+                green = green,
+                blue = blue
+            )
+        } else {
+            String::new()
+        }
+    }
+
+    #[allow(dead_code)]
+    pub(crate) fn background_color(red: u8, green: u8, blue: u8) -> String {
+        if TestResult::should_use_color() {
+            format!(
+                "\x1b[48;2;{red};{green};{blue}m",
+                red = red,
+                green = green,
+                blue = blue
+            )
+        } else {
+            String::new()
+        }
+    }
+
+    pub(crate) fn reset_color() -> &'static str {
+        if TestResult::should_use_color() {
+            "\x1b[0m"
+        } else {
+            ""
+        }
+    }
+
+    fn should_use_color() -> bool {
+        !std::env::var("NO_COLOR").is_ok_and(|val| !val.is_empty())
+    }
+}
+
+impl SingleFileResult {
+    fn print_indented(&self, indentation: usize) {
+        match self.status {
+            TestStatus::Pass => {
+                println!(
+                    "{indentation}{color}PASS{reset} {name}",
+                    indentation = "  ".repeat(indentation),
+                    color = TestResult::foreground_color(0, 255, 0),
+                    reset = TestResult::reset_color(),
+                    name = self.name
+                );
+            }
+            TestStatus::Fail => {
+                println!(
+                    "{indentation}{color}FAIL{reset} {name}",
+                    indentation = "  ".repeat(indentation),
+                    color = TestResult::foreground_color(255, 0, 0),
+                    reset = TestResult::reset_color(),
+                    name = self.name
+                );
+            }
+        }
+    }
+
+    fn has_bad_children(&self) -> bool {
+        false
+    }
+
+    fn is_immediately_bad(&self) -> bool {
+        match self.status {
+            TestStatus::Pass => false,
+            TestStatus::Fail => true,
+        }
+    }
+}
+
+impl ResultLayer {
+    fn print_indented(&self, indentation: usize) {
+        if self.is_immediately_bad() {
+            println!(
+                "{indentation}{color}FAIL{reset} {name}",
+                indentation = "  ".repeat(indentation),
+                color = TestResult::foreground_color(255, 0, 0),
+                reset = TestResult::reset_color(),
+                name = self.name
+            );
+        } else if self.has_bad_children() {
+            println!(
+                "{indentation}{color}BADCHILD{reset} {name}",
+                indentation = "  ".repeat(indentation),
+                color = TestResult::foreground_color(255, 255, 0),
+                reset = TestResult::reset_color(),
+                name = self.name
+            );
+        } else {
+            println!(
+                "{indentation}{color}PASS{reset} {name}",
+                indentation = "  ".repeat(indentation),
+                color = TestResult::foreground_color(0, 255, 0),
+                reset = TestResult::reset_color(),
+                name = self.name
+            );
+        }
+        self.children
+            .iter()
+            .for_each(|result| result.print_indented(indentation + 1));
+    }
+
+    fn has_bad_children(&self) -> bool {
+        self.children
+            .iter()
+            .any(|result| result.is_immediately_bad() || result.has_bad_children())
+    }
+
+    fn is_immediately_bad(&self) -> bool {
+        false
+    }
+}