Improve build times and test coverage.

Change CI build configurations to run a single minimal `cargo test ...`
for all environment permutations with a exhaustive test run in the
TravisCI stable build. Code coverage, formatting, and linting are all
separated into distinct jobs. Code coverage is changed from `kcov` and
`cargo coveralls` to `cargo tarpaulin`. Resolves #92.

.appveyor.yml

@@ -1,63 +1,65 @@
-# Appveyor configuration template for Rust using rustup for Rust installation
-# https://github.com/starkat99/appveyor-rust
-
-## Operating System (VM environment) ##
-os: Visual Studio 2017
-
-## Build Matrix ##
+build: false
+skip_tags: true
+cache:
+- C:\Users\appveyor\.cargo\registry
+- target
 environment:
   global:
+    CHANNEL: stable
     PROJECT_NAME: uom
+    # APPVEYOR_CACHE_SKIP_RESTORE: true  # Uncomment when caching causes problems
   matrix:
+  # Oldest supported
+  - TARGET: i686-pc-windows-msvc
+    CHANNEL: 1.20.0
+  - TARGET: i686-pc-windows-gnu
+    CHANNEL: 1.20.0
+  - TARGET: x86_64-pc-windows-msvc
+    CHANNEL: 1.20.0
+  - TARGET: x86_64-pc-windows-gnu
+    CHANNEL: 1.20.0
+  # Stable channel
+  - TARGET: i686-pc-windows-msvc
+    CHANNEL: stable
+  - TARGET: i686-pc-windows-gnu
+    CHANNEL: stable
+  - TARGET: x86_64-pc-windows-msvc
+    CHANNEL: stable
+  - TARGET: x86_64-pc-windows-gnu
+    CHANNEL: stable
+  # Beta channel
+  - TARGET: i686-pc-windows-msvc
+    CHANNEL: beta
+  - TARGET: i686-pc-windows-gnu
+    CHANNEL: beta
+  - TARGET: x86_64-pc-windows-msvc
+    CHANNEL: beta
+  - TARGET: x86_64-pc-windows-gnu
+    CHANNEL: beta
+  # Nightly channel
+  - TARGET: i686-pc-windows-msvc
+    CHANNEL: nightly
+  - TARGET: i686-pc-windows-gnu
+    CHANNEL: nightly
+  - TARGET: x86_64-pc-windows-msvc
+    CHANNEL: nightly
+  - TARGET: x86_64-pc-windows-gnu
+    CHANNEL: nightly
 
-### MSVC Toolchains ###
-  # Stable 64-bit MSVC
-    - channel: stable
-      target: x86_64-pc-windows-msvc
-  # Stable 32-bit MSVC
-    - channel: stable
-      target: i686-pc-windows-msvc
-  # Beta 64-bit MSVC
-    - channel: beta
-      target: x86_64-pc-windows-msvc
-  # Beta 32-bit MSVC
-    - channel: beta
-      target: i686-pc-windows-msvc
-
-### GNU Toolchains ###
-  # Stable 64-bit GNU
-    - channel: stable
-      target: x86_64-pc-windows-gnu
-  # Stable 32-bit GNU
-    - channel: stable
-      target: i686-pc-windows-gnu
-  # Beta 64-bit GNU
-    - channel: beta
-      target: x86_64-pc-windows-gnu
-  # Beta 32-bit GNU
-    - channel: beta
-      target: i686-pc-windows-gnu
-
-### Allowed failures ###
 matrix:
   allow_failures:
-    - channel: nightly
+  - CHANNEL: nightly
 
-## Install Script ##
 install:
-  - appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
-  - rustup-init -yv --default-toolchain %channel% --default-host %target%
-  - set PATH=%PATH%;%USERPROFILE%\.cargo\bin
-  - rustc -vV
-  - cargo -vV
+- appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
+- rustup-init -yv --default-toolchain %CHANNEL% --default-host %TARGET%
+- set PATH=%PATH%;%USERPROFILE%\.cargo\bin
+- rustc -Vv
+- cargo -V
 
-## Build Script ##
-build: false
 test_script:
-  - cargo build --verbose --no-default-features --features "autoconvert usize u8 u16 u32 u64 isize i8 i16 i32 i64 bigint biguint rational rational32 rational64 bigrational f32 f64 si std use_serde"
-  - cargo test --verbose --no-run --no-default-features --features "autoconvert usize u8 u16 u32 u64 isize i8 i16 i32 i64 bigint biguint rational rational32 rational64 bigrational f32 f64 std use_serde"
-  - cargo test --all --verbose --features "use_serde"
+- cargo test --verbose --features "use_serde %CHANNEL:.=_%"
 
 notifications:
-    - provider: Email
-      on_build_success: false
+- provider: Email
+  on_build_success: false

.travis.yml

@@ -1,49 +1,58 @@
 language: rust
 cache: cargo
-sudo: false
-
-# Dependencies of kcov, used by coverage
+sudo: required
 addons:
   apt:
     packages:
-      - libcurl4-openssl-dev
-      - libelf-dev
-      - libdw-dev
-      - binutils-dev
-      - cmake
-    sources:
-      - kalakris-cmake
+    - libssl-dev
 
 rust:
-  - stable
-  - beta
-  - nightly
-  - 1.20.0
+- 1.20.0    # Oldest supported
+#- stable   # Done by explicit job
+- beta
+- nightly
 
 matrix:
   allow_failures:
-    - rust: nightly
+  - rust: nightly
   include:
+  - env: TEST
+    rust: stable
+    script: |
+      set -e
+      cargo test --verbose --features "use_serde ${TRAVIS_RUST_VERSION//./_}"
+      cargo test --manifest-path tests/feature_check/Cargo.toml --verbose --features "${TRAVIS_RUST_VERSION//./_}"
+      cargo test --verbose --no-default-features --features "autoconvert f32 f64 si use_serde ${TRAVIS_RUST_VERSION//./_}"
+      cargo test --verbose --no-run --no-default-features --features "autoconvert usize u8 u16 u32 u64 isize i8 i16 i32 i64 bigint biguint rational rational32 rational64 bigrational f32 f64 std use_serde ${TRAVIS_RUST_VERSION//./_}"
   - env: RUSTFMT
-    rust: 1.26.1
+    rust: stable
     install:
     - rustup component add rustfmt-preview
     script:
-    - cargo fmt -- --write-mode=diff
-
-before_script: |
-  test "${TRAVIS_RUST_VERSION//./_}" != "stable" ||
-  (test -x /home/travis/.cargo/bin/cargo-coveralls || cargo install cargo-travis) ||
-  (test $(grep "cargo-travis" /home/travis/.cargo/.crates.toml | sed -r "s/\"cargo-travis ([^\ ]+).+/\1/") = $(cargo search cargo-travis --limit 1 | sed -r "s/cargo-travis \(([^\)]+)\).+/\1/") || cargo install cargo-travis --force)
+    - cargo fmt -- --check
+  - env: RUSTFLAGS="-D warnings"
+    rust: stable
+    script:
+    - RUSTFLAGS="-D warnings" cargo check --tests
+  - env: CLIPPY
+    rust: nightly
+    install:
+    - rustup component add clippy-preview
+    script:
+    - cargo clippy -- -D clippy
+  - env: TARPAULIN
+    rust: stable
+    script:
+    - docker run --security-opt seccomp=unconfined -v "$PWD:/volume" xd009642/tarpaulin sh -c "cargo build && cargo tarpaulin --ciserver travis-ci --coveralls $TRAVIS_JOB_ID"
 
-script: |
-  cargo build --verbose --no-default-features --features "autoconvert usize u8 u16 u32 u64 isize i8 i16 i32 i64 bigint biguint rational rational32 rational64 bigrational f32 f64 si std use_serde" &&
-  cargo test --verbose --no-run --no-default-features --features "autoconvert usize u8 u16 u32 u64 isize i8 i16 i32 i64 bigint biguint rational rational32 rational64 bigrational f32 f64 std use_serde ${TRAVIS_RUST_VERSION//./_}" &&
-  cargo test --verbose --features "use_serde ${TRAVIS_RUST_VERSION//./_}" &&
-  cargo test --manifest-path tests/feature_check/Cargo.toml --verbose --features "${TRAVIS_RUST_VERSION//./_}"
+install:
+- rustc -Vv
+- cargo -V
 
-after_success: |
-  test "${TRAVIS_RUST_VERSION//./_}" != "stable" || cargo coveralls
+script:
+- set -e
+- cargo test --verbose --features "use_serde ${TRAVIS_RUST_VERSION//./_}"
+- cargo test --manifest-path tests/feature_check/Cargo.toml --verbose --features "${TRAVIS_RUST_VERSION//./_}"
 
 notifications:
   email:

src/lib.rs

@@ -146,7 +146,8 @@
 
 // Compile with `no_std` when the `std` feature is not specified.
 #![cfg_attr(not(feature = "std"), no_std)]
-// Default rustc lints.
+// Rustc lints.
+// #![warn(bare_trait_objects)] // Requires rustc 1.27.
 #![warn(missing_copy_implementations)]
 #![warn(missing_debug_implementations)]
 #![warn(missing_docs)]

src/si/length.rs

@@ -79,7 +79,7 @@ where
     }
 }
 
-#[cfg(test)]
+#[cfg(all(test, feature = "std"))]
 mod tests {
     storage_types! {
         types: Float;

src/tests/quantity.rs

@@ -1,6 +1,5 @@
 //! Tests for the `quantity!` macro.
 
-#[cfg(feature = "autoconvert")]
 storage_types! {
     use tests::*;
 
@@ -50,6 +49,7 @@ storage_types! {
         assert_eq!(&"10 kg //10,000 g".parse::<k::Length>(), &Err(ParseQuantityError::UnknownUnit));
     }
 
+    #[cfg(feature = "autoconvert")]
     quickcheck! {
         #[allow(trivial_casts)]
         fn add(l: A<V>, r: A<V>) -> bool {