Remove separate test files in favor of same-file mod tests (#9199)

## Summary

These were moved as part of a broader refactor to create a single
integration test module. That "single integration test module" did
indeed have a big impact on compile times, which is great! But we aren't
seeing any benefit from moving these tests into their own files (despite
the claim in [this blog
post](https://matklad.github.io/2021/02/27/delete-cargo-integration-tests.html),
I see the same compilation pattern regardless of where the tests are
located). Plus, we don't have many of these, and same-file tests is such
a strong Rust convention.

crates/uv-dev/src/generate_cli_reference.rs

@@ -330,4 +330,24 @@ fn emit_possible_options(opt: &clap::Arg, output: &mut String) {
 }
 
 #[cfg(test)]
-mod tests;
+mod tests {
+    use std::env;
+
+    use anyhow::Result;
+
+    use uv_static::EnvVars;
+
+    use crate::generate_all::Mode;
+
+    use super::{main, Args};
+
+    #[test]
+    fn test_generate_cli_reference() -> Result<()> {
+        let mode = if env::var(EnvVars::UV_UPDATE_SCHEMA).as_deref() == Ok("1") {
+            Mode::Write
+        } else {
+            Mode::Check
+        };
+        main(&Args { mode })
+    }
+}

crates/uv-dev/src/generate_cli_reference/tests.rs

@@ -1,19 +0,0 @@
-use std::env;
-
-use anyhow::Result;
-
-use uv_static::EnvVars;
-
-use crate::generate_all::Mode;
-
-use super::{main, Args};
-
-#[test]
-fn test_generate_cli_reference() -> Result<()> {
-    let mode = if env::var(EnvVars::UV_UPDATE_SCHEMA).as_deref() == Ok("1") {
-        Mode::Write
-    } else {
-        Mode::Check
-    };
-    main(&Args { mode })
-}

crates/uv-dev/src/generate_env_vars_reference.rs

@@ -100,4 +100,24 @@ fn render(var: &str, doc: &str) -> String {
 }
 
 #[cfg(test)]
-mod tests;
+mod tests {
+    use std::env;
+
+    use anyhow::Result;
+
+    use uv_static::EnvVars;
+
+    use crate::generate_all::Mode;
+
+    use super::{main, Args};
+
+    #[test]
+    fn test_generate_env_vars_reference() -> Result<()> {
+        let mode = if env::var(EnvVars::UV_UPDATE_SCHEMA).as_deref() == Ok("1") {
+            Mode::Write
+        } else {
+            Mode::Check
+        };
+        main(&Args { mode })
+    }
+}

crates/uv-dev/src/generate_env_vars_reference/tests.rs

@@ -1,19 +0,0 @@
-use std::env;
-
-use anyhow::Result;
-
-use uv_static::EnvVars;
-
-use crate::generate_all::Mode;
-
-use super::{main, Args};
-
-#[test]
-fn test_generate_env_vars_reference() -> Result<()> {
-    let mode = if env::var(EnvVars::UV_UPDATE_SCHEMA).as_deref() == Ok("1") {
-        Mode::Write
-    } else {
-        Mode::Check
-    };
-    main(&Args { mode })
-}

crates/uv-dev/src/generate_json_schema.rs

@@ -107,4 +107,24 @@ fn generate() -> String {
 }
 
 #[cfg(test)]
-mod tests;
+mod tests {
+    use std::env;
+
+    use anyhow::Result;
+
+    use uv_static::EnvVars;
+
+    use crate::generate_all::Mode;
+
+    use super::{main, Args};
+
+    #[test]
+    fn test_generate_json_schema() -> Result<()> {
+        let mode = if env::var(EnvVars::UV_UPDATE_SCHEMA).as_deref() == Ok("1") {
+            Mode::Write
+        } else {
+            Mode::Check
+        };
+        main(&Args { mode })
+    }
+}

crates/uv-dev/src/generate_json_schema/tests.rs

@@ -1,19 +0,0 @@
-use std::env;
-
-use anyhow::Result;
-
-use uv_static::EnvVars;
-
-use crate::generate_all::Mode;
-
-use super::{main, Args};
-
-#[test]
-fn test_generate_json_schema() -> Result<()> {
-    let mode = if env::var(EnvVars::UV_UPDATE_SCHEMA).as_deref() == Ok("1") {
-        Mode::Write
-    } else {
-        Mode::Check
-    };
-    main(&Args { mode })
-}

crates/uv-dev/src/generate_options_reference.rs

@@ -386,4 +386,24 @@ impl Visit for CollectOptionsVisitor {
 }
 
 #[cfg(test)]
-mod tests;
+mod tests {
+    use std::env;
+
+    use anyhow::Result;
+
+    use uv_static::EnvVars;
+
+    use crate::generate_all::Mode;
+
+    use super::{main, Args};
+
+    #[test]
+    fn test_generate_options_reference() -> Result<()> {
+        let mode = if env::var(EnvVars::UV_UPDATE_SCHEMA).as_deref() == Ok("1") {
+            Mode::Write
+        } else {
+            Mode::Check
+        };
+        main(&Args { mode })
+    }
+}

crates/uv-dev/src/generate_options_reference/tests.rs

@@ -1,19 +0,0 @@
-use std::env;
-
-use anyhow::Result;
-
-use uv_static::EnvVars;
-
-use crate::generate_all::Mode;
-
-use super::{main, Args};
-
-#[test]
-fn test_generate_options_reference() -> Result<()> {
-    let mode = if env::var(EnvVars::UV_UPDATE_SCHEMA).as_deref() == Ok("1") {
-        Mode::Write
-    } else {
-        Mode::Check
-    };
-    main(&Args { mode })
-}