Add tests for cargo remove

Author: cassaundra

tests/testsuite/cargo_remove/avoid_empty_tables/in

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+../remove-basic.in/

tests/testsuite/cargo_remove/avoid_empty_tables/mod.rs

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+use cargo_test_support::compare::assert_ui;
+use cargo_test_support::curr_dir;
+use cargo_test_support::CargoCommand;
+use cargo_test_support::Project;
+
+use crate::cargo_remove::init_registry;
+
+#[cargo_test]
+fn case() {
+    init_registry();
+    let project = Project::from_template(curr_dir!().join("in"));
+    let project_root = project.root();
+    let cwd = &project_root;
+
+    snapbox::cmd::Command::cargo_ui()
+        .arg("remove")
+        .args(["clippy"])
+        .current_dir(cwd)
+        .assert()
+        .success()
+        .stdout_matches_path(curr_dir!().join("stdout.log"))
+        .stderr_matches_path(curr_dir!().join("stderr.log"));
+
+    assert_ui().subset_matches(curr_dir!().join("out"), &project_root);
+}

tests/testsuite/cargo_remove/avoid_empty_tables/out/Cargo.toml

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+[package]
+name = "cargo-remove-test-fixture"
+version = "0.1.0"
+
+[[bin]]
+name = "main"
+path = "src/main.rs"
+
+[build-dependencies]
+semver = "0.1.0"
+
+[dependencies]
+docopt = "0.6"
+rustc-serialize = "0.4"
+semver = "0.1"
+toml = "0.1"
+
+[dev-dependencies]
+regex = "0.1.1"
+serde = "1.0.90"
+
+[features]
+std = ["serde/std", "semver/std"]

tests/testsuite/cargo_remove/avoid_empty_tables/stderr.log

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+    Removing clippy from dependencies
+    Updating `dummy-registry` index

tests/testsuite/cargo_remove/avoid_empty_tables/stdout.log

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+../remove-basic.in/

tests/testsuite/cargo_remove/build/in

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+use cargo_test_support::compare::assert_ui;
+use cargo_test_support::curr_dir;
+use cargo_test_support::CargoCommand;
+use cargo_test_support::Project;
+
+use crate::cargo_remove::init_registry;
+
+#[cargo_test]
+fn case() {
+    init_registry();
+    let project = Project::from_template(curr_dir!().join("in"));
+    let project_root = project.root();
+    let cwd = &project_root;
+
+    snapbox::cmd::Command::cargo_ui()
+        .arg("remove")
+        .args(["--build", "semver"])
+        .current_dir(cwd)
+        .assert()
+        .success()
+        .stdout_matches_path(curr_dir!().join("stdout.log"))
+        .stderr_matches_path(curr_dir!().join("stderr.log"));
+
+    assert_ui().subset_matches(curr_dir!().join("out"), &project_root);
+}

tests/testsuite/cargo_remove/build/mod.rs

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+[package]
+name = "cargo-remove-test-fixture"
+version = "0.1.0"
+
+[[bin]]
+name = "main"
+path = "src/main.rs"
+
+[dependencies]
+docopt = "0.6"
+rustc-serialize = "0.4"
+semver = "0.1"
+toml = "0.1"
+clippy = "0.4"
+
+[dev-dependencies]
+regex = "0.1.1"
+serde = "1.0.90"
+
+[features]
+std = ["serde/std", "semver/std"]

tests/testsuite/cargo_remove/build/out/Cargo.toml

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+    Removing semver from build-dependencies
+    Updating `dummy-registry` index