Add test_freeze_deps

conda-solver-tests/basic.yaml

@@ -1249,6 +1249,198 @@ tests:
       link_precs:
         - channel-4/${{ arch }}::flask-0.12.2-py36hb24657c_0
 
+  - name: test_freeze_deps_1_1
+    id: B046
+    provenance: tests/core/test_solve.py::test_freeze_deps_1::1
+    kind: solve
+    description: "Installs six=1.7 into an empty env. This establishes the baseline prefix (final_state_1) used by all subsequent steps."
+    input:
+      channels: channel-2
+      specs_to_add: six=1.7
+    output:
+      final_state:
+        - channel-2/${{ arch }}::openssl-1.0.2l-0
+        - channel-2/${{ arch }}::readline-6.2-2
+        - channel-2/${{ arch }}::sqlite-3.13.0-0
+        - channel-2/${{ arch }}::tk-8.5.18-0
+        - channel-2/${{ arch }}::xz-5.2.3-0
+        - channel-2/${{ arch }}::zlib-1.2.11-0
+        - channel-2/${{ arch }}::python-3.4.5-0
+        - channel-2/${{ arch }}::six-1.7.3-py34_0
+
+  - name: test_freeze_deps_1_2
+    id: B047
+    provenance: tests/core/test_solve.py::test_freeze_deps_1::2
+    kind: solve_for_diff
+    description: "Adds bokeh to the prefix. six stays at 1.7 because it's pinned by the history spec. Python stays at 3.4, so we get bokeh 0.12.4 (not 0.12.5)."
+    input:
+      channels: channel-2
+      specs_to_add: bokeh
+      prefix:
+        - channel-2/${{ arch }}::openssl-1.0.2l-0
+        - channel-2/${{ arch }}::readline-6.2-2
+        - channel-2/${{ arch }}::sqlite-3.13.0-0
+        - channel-2/${{ arch }}::tk-8.5.18-0
+        - channel-2/${{ arch }}::xz-5.2.3-0
+        - channel-2/${{ arch }}::zlib-1.2.11-0
+        - channel-2/${{ arch }}::python-3.4.5-0
+        - channel-2/${{ arch }}::six-1.7.3-py34_0
+      history_specs: six=1.7
+    output:
+      unlink_precs: []
+      link_precs:
+        - channel-2/${{ arch }}::mkl-2017.0.3-0
+        - channel-2/${{ arch }}::yaml-0.1.6-0
+        - channel-2/${{ arch }}::backports_abc-0.5-py34_0
+        - channel-2/${{ arch }}::markupsafe-1.0-py34_0
+        - channel-2/${{ arch }}::numpy-1.13.0-py34_0
+        - channel-2/${{ arch }}::pyyaml-3.12-py34_0
+        - channel-2/${{ arch }}::requests-2.14.2-py34_0
+        - channel-2/${{ arch }}::setuptools-27.2.0-py34_0
+        - channel-2/${{ arch }}::jinja2-2.9.6-py34_0
+        - channel-2/${{ arch }}::python-dateutil-2.6.1-py34_0
+        - channel-2/${{ arch }}::tornado-4.4.2-py34_0
+        - channel-2/${{ arch }}::bokeh-0.12.4-py34_0
+
+  - name: test_freeze_deps_1_3
+    id: B048
+    provenance: tests/core/test_solve.py::test_freeze_deps_1::3
+    kind: solve_for_diff
+    description: "Here we get bokeh=0.12.4 instead of 0.12.5 because we have python=3.4"
+    input:
+      channels: channel-2
+      specs_to_add: bokeh
+      prefix:
+        - channel-2/${{ arch }}::openssl-1.0.2l-0
+        - channel-2/${{ arch }}::readline-6.2-2
+        - channel-2/${{ arch }}::sqlite-3.13.0-0
+        - channel-2/${{ arch }}::tk-8.5.18-0
+        - channel-2/${{ arch }}::xz-5.2.3-0
+        - channel-2/${{ arch }}::zlib-1.2.11-0
+        - channel-2/${{ arch }}::python-3.4.5-0
+        - channel-2/${{ arch }}::six-1.7.3-py34_0
+      history_specs:
+        - six=1.7
+        - python=3.4
+    output:
+      unlink_precs: []
+      link_precs:
+        - channel-2/${{ arch }}::mkl-2017.0.3-0
+        - channel-2/${{ arch }}::yaml-0.1.6-0
+        - channel-2/${{ arch }}::backports_abc-0.5-py34_0
+        - channel-2/${{ arch }}::markupsafe-1.0-py34_0
+        - channel-2/${{ arch }}::numpy-1.13.0-py34_0
+        - channel-2/${{ arch }}::pyyaml-3.12-py34_0
+        - channel-2/${{ arch }}::requests-2.14.2-py34_0
+        - channel-2/${{ arch }}::setuptools-27.2.0-py34_0
+        - channel-2/${{ arch }}::jinja2-2.9.6-py34_0
+        - channel-2/${{ arch }}::python-dateutil-2.6.1-py34_0
+        - channel-2/${{ arch }}::tornado-4.4.2-py34_0
+        - channel-2/${{ arch }}::bokeh-0.12.4-py34_0
+
+  - name: test_freeze_deps_1_4
+    id: B049
+    provenance: tests/core/test_solve.py::test_freeze_deps_1::4
+    kind: unsatisfiable
+    description: "Here we get unsatisfiability because bokeh=0.12.5 is not compatible with python=3.4"
+    input:
+      channels: channel-2
+      specs_to_add: bokeh=0.12.5
+      prefix:
+        - channel-2/${{ arch }}::openssl-1.0.2l-0
+        - channel-2/${{ arch }}::readline-6.2-2
+        - channel-2/${{ arch }}::sqlite-3.13.0-0
+        - channel-2/${{ arch }}::tk-8.5.18-0
+        - channel-2/${{ arch }}::xz-5.2.3-0
+        - channel-2/${{ arch }}::zlib-1.2.11-0
+        - channel-2/${{ arch }}::python-3.4.5-0
+        - channel-2/${{ arch }}::six-1.7.3-py34_0
+      history_specs:
+        - six=1.7
+        - python=3.4
+    error:
+      exception: UnsatisfiableError
+      entries: []
+
+  - name: test_freeze_deps_1_5
+    id: B050
+    provenance: tests/core/test_solve.py::test_freeze_deps_1::5
+    kind: solve_for_diff
+    description: |
+      Now adding the explicit python spec allows conda to change the python version. One possible outcome
+      is that this updates to python 3.6. That is not desirable because of the explicit "six=1.7" request
+      in the history. It should only neuter that spec if there's no way to solve it with that spec.
+    input:
+      channels: channel-2
+      specs_to_add:
+        - bokeh=0.12.5
+        - python
+      prefix:
+        - channel-2/${{ arch }}::openssl-1.0.2l-0
+        - channel-2/${{ arch }}::readline-6.2-2
+        - channel-2/${{ arch }}::sqlite-3.13.0-0
+        - channel-2/${{ arch }}::tk-8.5.18-0
+        - channel-2/${{ arch }}::xz-5.2.3-0
+        - channel-2/${{ arch }}::zlib-1.2.11-0
+        - channel-2/${{ arch }}::python-3.4.5-0
+        - channel-2/${{ arch }}::six-1.7.3-py34_0
+      history_specs:
+        - six=1.7
+        - python=3.4
+    output:
+      unlink_precs:
+        - channel-2/${{ arch }}::six-1.7.3-py34_0
+        - channel-2/${{ arch }}::python-3.4.5-0
+        - channel-2/${{ arch }}::xz-5.2.3-0
+      link_precs:
+        - channel-2/${{ arch }}::mkl-2017.0.3-0
+        - channel-2/${{ arch }}::yaml-0.1.6-0
+        - channel-2/${{ arch }}::python-2.7.13-0
+        - channel-2/${{ arch }}::backports-1.0-py27_0
+        - channel-2/${{ arch }}::backports_abc-0.5-py27_0
+        - channel-2/${{ arch }}::certifi-2016.2.28-py27_0
+        - channel-2/${{ arch }}::futures-3.1.1-py27_0
+        - channel-2/${{ arch }}::markupsafe-1.0-py27_0
+        - channel-2/${{ arch }}::numpy-1.13.1-py27_0
+        - channel-2/${{ arch }}::pyyaml-3.12-py27_0
+        - channel-2/${{ arch }}::requests-2.14.2-py27_0
+        - channel-2/${{ arch }}::six-1.7.3-py27_0
+        - channel-2/${{ arch }}::python-dateutil-2.6.1-py27_0
+        - channel-2/${{ arch }}::setuptools-36.4.0-py27_1
+        - channel-2/${{ arch }}::singledispatch-3.4.0.3-py27_0
+        - channel-2/${{ arch }}::ssl_match_hostname-3.5.0.1-py27_0
+        - channel-2/${{ arch }}::jinja2-2.9.6-py27_0
+        - channel-2/${{ arch }}::tornado-4.5.2-py27_0
+        - channel-2/${{ arch }}::bokeh-0.12.5-py27_1
+
+  - name: test_freeze_deps_1_6
+    id: B051
+    provenance: tests/core/test_solve.py::test_freeze_deps_1::6
+    kind: unsatisfiable
+    description: >-
+      Same as B049 but with update_modifier set to freeze_installed. With frozen
+      installed packages, conda cannot downgrade python from 3.4 to 2.7, so
+      bokeh=0.12.5 (which requires python<3.0) is unsatisfiable.
+    input:
+      channels: channel-2
+      specs_to_add: bokeh=0.12.5
+      prefix:
+        - channel-2/${{ arch }}::openssl-1.0.2l-0
+        - channel-2/${{ arch }}::readline-6.2-2
+        - channel-2/${{ arch }}::sqlite-3.13.0-0
+        - channel-2/${{ arch }}::tk-8.5.18-0
+        - channel-2/${{ arch }}::xz-5.2.3-0
+        - channel-2/${{ arch }}::zlib-1.2.11-0
+        - channel-2/${{ arch }}::python-3.4.5-0
+        - channel-2/${{ arch }}::six-1.7.3-py34_0
+      history_specs:
+        - six=1.7
+        - python=3.4
+      update_modifier: freeze_installed
+    error:
+      exception: UnsatisfiableError
+      entries: []
+
   - name: test_update_deps_2_3
     id: B035
     provenance: tests/core/test_solve.py::test_update_deps_2::3