py-visa: update to 1.9.1, add py37

- fix tests
- install files in post-destroot

python/py-visa/Portfile

@@ -4,8 +4,8 @@ PortSystem          1.0
 PortGroup           python 1.0
 PortGroup           github 1.0
 
-github.setup        hgrecco pyvisa 1.8
-
+github.setup        hgrecco pyvisa 1.9.1
+revision            0
 name                py-visa
 categories-append   science
 platforms           darwin
@@ -28,20 +28,41 @@ long_description    PyVISA allows dialog between a computer and\
                     \n\tinstall a universal Python and execute python in\
                     32-bit mode with ‘arch -i386’.
 
-checksums           rmd160  6bc43d1aed4f8f9823ec164ecc510bdb224164fe \
-                    sha256  42711646de0b77b8c6d786da7fdda1b4dc3a47453c55880dc9391fc049e82136
+checksums           rmd160  545b907337370cfe486d640991050fcce08f5e7d \
+                    sha256  12765a171f149413e55ce5a0c8d344ce571b6f01441914113d28358e356ad182 \
+                    size    432244
 
-python.versions     27 34 35 36
+python.versions     27 34 35 36 37
 
 if {${name} ne ${subport}} {
-    depends_build-append    port:py${python.version}-setuptools\
-                            port:py${python.version}-sphinx
+    depends_lib-append \
+                    port:py${python.version}-setuptools
+
+    if {${python.version} eq 27} {
+        depends_lib-append \
+                    port:py${python.version}-enum34
+    }
+
+    post-destroot {
+        set docdir ${prefix}/share/doc/${subport}
+        xinstall -d ${destroot}${docdir}
+        xinstall -m 0644 -W ${worksrcpath} README LICENSE \
+            ChangeLog CHANGES AUTHORS ${destroot}${docdir}
+    }
 
     notes "
 If you are migrating from py-visa < 1.5, read https://pyvisa.readthedocs.org/en/stable/migrating.html
 for possible compatibility issues.
 "
 
-    test.run                yes
-    livecheck.type          none
+    depends_lib-append \
+                    port:py${python.version}-mock \
+                    port:py${python.version}-pytest \
+                    port:py${python.version}-sphinx
+    test.run        yes
+    test.cmd        py.test-${python.branch}
+    test.target
+    test.env        PYTHONPATH=${worksrcpath}/build/lib
+
+    livecheck.type  none
 }