Add integration tests for configuration discovery (#3082)

crates/uv/tests/pip_compile.rs

@@ -7810,3 +7810,185 @@ fn no_version_for_direct_dependency() -> Result<()> {
 
     Ok(())
 }
+
+/// Verify that command-line arguments take precedence over on-disk configuration.
+#[test]
+fn resolve_configuration() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    // Write a `uv.toml` file to the directory.
+    let config = context.temp_dir.child("uv.toml");
+    config.write_str(indoc::indoc! {r#"
+        [pip]
+        resolution = "lowest-direct"
+        generate-hashes = true
+    "#})?;
+
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("anyio>3.0.0")?;
+
+    // Resolution should use the lowest direct version, and generate hashes.
+    uv_snapshot!(context.compile()
+        .arg("requirements.in"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in
+    anyio==3.0.1 \
+        --hash=sha256:1ef7622396ab55829d4236a6f75e2199df6d26a4ba79bea0cb942a5fd2f79a23 \
+        --hash=sha256:ed71f7542ef39875b65def219794d9dcb0a48c571317b13612c12b1f292701b5
+    idna==3.6 \
+        --hash=sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca \
+        --hash=sha256:c05567e9c24a6b9faaa835c4821bad0590fbb9d5779e7caa6e1cc4978e7eb24f
+        # via anyio
+    sniffio==1.3.1 \
+        --hash=sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2 \
+        --hash=sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc
+        # via anyio
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    "###
+    );
+
+    // Resolution should use the highest version, and generate hashes.
+    uv_snapshot!(context.compile()
+        .arg("requirements.in")
+        .arg("--resolution=highest"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --resolution=highest
+    anyio==4.3.0 \
+        --hash=sha256:048e05d0f6caeed70d731f3db756d35dcc1f35747c8c403364a8332c630441b8 \
+        --hash=sha256:f75253795a87df48568485fd18cdd2a3fa5c4f7c5be8e5e36637733fce06fed6
+    idna==3.6 \
+        --hash=sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca \
+        --hash=sha256:c05567e9c24a6b9faaa835c4821bad0590fbb9d5779e7caa6e1cc4978e7eb24f
+        # via anyio
+    sniffio==1.3.1 \
+        --hash=sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2 \
+        --hash=sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc
+        # via anyio
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    "###
+    );
+
+    // Resolution should use the highest version, and omit hashes.
+    uv_snapshot!(context.compile()
+        .arg("requirements.in")
+        .arg("--resolution=highest")
+        .arg("--no-generate-hashes"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in --resolution=highest --no-generate-hashes
+    anyio==4.3.0
+    idna==3.6
+        # via anyio
+    sniffio==1.3.1
+        # via anyio
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    "###
+    );
+
+    // Write a `pyproject.toml` file to the directory.
+    let pyproject = context.temp_dir.child("pyproject.toml");
+    pyproject.write_str(indoc::indoc! {r#"
+        [project]
+        name = "example"
+        version = "0.0.0"
+    "#})?;
+
+    // Resolution should use the lowest direct version, and generate hashes.
+    uv_snapshot!(context.compile()
+        .arg("requirements.in"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in
+    anyio==3.0.1 \
+        --hash=sha256:1ef7622396ab55829d4236a6f75e2199df6d26a4ba79bea0cb942a5fd2f79a23 \
+        --hash=sha256:ed71f7542ef39875b65def219794d9dcb0a48c571317b13612c12b1f292701b5
+    idna==3.6 \
+        --hash=sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca \
+        --hash=sha256:c05567e9c24a6b9faaa835c4821bad0590fbb9d5779e7caa6e1cc4978e7eb24f
+        # via anyio
+    sniffio==1.3.1 \
+        --hash=sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2 \
+        --hash=sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc
+        # via anyio
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    "###
+    );
+
+    // Remove the `uv.toml` file.
+    fs_err::remove_file(config.path())?;
+
+    // Resolution should use the highest version, and omit hashes.
+    uv_snapshot!(context.compile()
+        .arg("requirements.in"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in
+    anyio==4.3.0
+    idna==3.6
+        # via anyio
+    sniffio==1.3.1
+        # via anyio
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    "###
+    );
+
+    // Add configuration to the `pyproject.toml` file.
+    pyproject.write_str(indoc::indoc! {r#"
+        [project]
+        name = "example"
+        version = "0.0.0"
+
+        [tool.uv.pip]
+        resolution = "lowest-direct"
+        generate-hashes = true
+    "#})?;
+
+    // Resolution should use the lowest direct version, and generate hashes.
+    uv_snapshot!(context.compile()
+        .arg("requirements.in"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2024-03-25T00:00:00Z requirements.in
+    anyio==3.0.1 \
+        --hash=sha256:1ef7622396ab55829d4236a6f75e2199df6d26a4ba79bea0cb942a5fd2f79a23 \
+        --hash=sha256:ed71f7542ef39875b65def219794d9dcb0a48c571317b13612c12b1f292701b5
+    idna==3.6 \
+        --hash=sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca \
+        --hash=sha256:c05567e9c24a6b9faaa835c4821bad0590fbb9d5779e7caa6e1cc4978e7eb24f
+        # via anyio
+    sniffio==1.3.1 \
+        --hash=sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2 \
+        --hash=sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc
+        # via anyio
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    "###
+    );
+
+    Ok(())
+}