use vcr for test request caching

DESCRIPTION

@@ -5,7 +5,7 @@ Description: Retrieve, map and summarize data from the 'VertNet.org'
     parameters, including 'taxonomic' names, places, and dates. In addition, 
     there is an interface for conducting spatially delimited searches, and 
     another for requesting large 'datasets' via email.
-Version: 0.7.4.91
+Version: 0.7.5.91
 Authors@R: c(
     person("Scott", "Chamberlain",
         role = c("aut", "cre"),
@@ -30,7 +30,8 @@ Imports:
     maps
 Suggests:
     testthat,
-    knitr
+    knitr,
+    vcr
 RoxygenNote: 7.0.2
 X-schema.org-applicationCategory: Data Access
 X-schema.org-keywords: species, occurrences, biodiversity, maps, vertnet, mammals, mammalia, specimens

tests/fixtures/bigsearch.yml

@@ -0,0 +1,30 @@
+http_interactions:
+- request:
+    method: get
+    uri: http://api.vertnet-portal.appspot.com/api/download?q=%7B%22q%22%3A%22specificepithet%3Aprinceps%20genus%3Aochotona%22%2C%22n%22%3A%22test-bigsearch1%22%2C%22e%22%3A%22stuff%40things.com%22%7D
+    body:
+      encoding: ''
+      string: ''
+    headers:
+      User-Agent: libcurl/7.54.0 r-curl/4.3 crul/0.9.0
+      Accept-Encoding: gzip, deflate
+      Accept: application/json, text/xml, application/xml, */*
+  response:
+    status:
+      status_code: '200'
+      message: OK
+      explanation: Request fulfilled, document follows
+    headers:
+      status: HTTP/1.1 200 OK
+      content-type: text/html; charset=utf-8
+      cache-control: no-cache
+      x-cloud-trace-context: 3ea5338098e843d315bc875d83eaca20
+      date: Wed, 29 Jan 2020 16:43:39 GMT
+      server: Google Frontend
+      content-length: '0'
+    body:
+      encoding: UTF-8
+      file: no
+      string: ''
+  recorded_at: 2020-01-29 16:43:39 GMT
+  recorded_with: vcr/0.4.0, webmockr/0.5.0

tests/fixtures/vert_id.yml

@@ -0,0 +1,83 @@
+http_interactions:
+- request:
+    method: get
+    uri: http://api.vertnet-portal.appspot.com/api/search?q=%7B%22q%22%3A%22iptrecordid%3A%5C%22urn%3Acatalog%3ACM%3AHerps%3A116520%5C%22%22%7D
+    body:
+      encoding: ''
+      string: ''
+    headers:
+      User-Agent: libcurl/7.54.0 r-curl/4.3 crul/0.9.0
+      Accept-Encoding: gzip, deflate
+      Accept: application/json, text/xml, application/xml, */*
+  response:
+    status:
+      status_code: '200'
+      message: OK
+      explanation: Request fulfilled, document follows
+    headers:
+      status: HTTP/1.1 200 OK
+      cache-control: no-cache
+      content-type: application/json
+      charset: utf-8
+      x-cloud-trace-context: a90fdc3654cda9f6c7ad2262da20766b
+      date: Wed, 29 Jan 2020 16:51:58 GMT
+      server: Google Frontend
+      content-length: '4311'
+    body:
+      encoding: UTF-8
+      file: no
+      string: '{"request_date": "2020-01-29T16:51:58.788949", "response_records":
+        1, "submitted_query": "iptrecordid:\"urn:catalog:CM:Herps:116520\"", "request_origin":
+        "45.505106,-122.675026", "limit": 400, "cursor": null, "query_version": "search.py
+        2016-08-15T16:43+02:00", "recs": [{"haslifestage": "0", "month": "8", "decimallongitude":
+        "-104.19", "startdayofyear": "216", "networks": "HerpNET,VertNet", "vntype":
+        "specimen", "title": "CM Herps Collection", "accessrights": "http://vertnet.org/resources/norms.html",
+        "kingdom": "Animalia", "verbatimcoordinatesystem": "decimal degrees", "dctype":
+        "PhysicalObject", "iptrecordid": "urn:catalog:CM:Herps:116520", "day": "4",
+        "occurrenceid": "urn:catalog:CM:Herps:116520", "collectioncode": "Herps",
+        "georeferenceddate": "2006-11-17", "verbatimeventdate": "1965-08-04", "coordinateuncertaintyinmeters":
+        "20308", "higherclassification": "Animalia | Chordata | Amphibia | Anura |
+        BUFONIDAE | BUFO", "pubdate": "2017-09-27", "year": "1965", "wasinvasive":
+        "0", "specificepithet": "debilis", "basisofrecord": "PreservedSpecimen", "geodeticdatum":
+        "WGS84", "occurrenceremarks": "TOWSON STATE UNIVERSITY COLLECTION.", "highergeography":
+        "North America | United States | New Mexico | Eddy |  |  |  |", "continent":
+        "North America", "email": "[email protected]", "orgcountry": "United
+        States", "source_url": "http://ipt.vertnet.org:8080/ipt/resource.do?r=cm_herps",
+        "scientificname": "BUFO DEBILIS", "hashid": "3327", "hassex": "0", "language":
+        "en", "institutionid": "urn:lsid:biocol.org:col:34702", "country": "United
+        States", "hastissue": "0", "genus": "Bufo", "georeferenceprotocol": "VertNet
+        Georeferencing Guidelines", "family": "Bufonidae", "stateprovince": "New Mexico",
+        "rank": 12, "county": "Eddy", "phylum": "Chordata", "references": "http://portal.vertnet.org/o/cm/herps?id=urn-catalog-cm-herps-116520",
+        "georeferencedby": "Stephen R. (MSB)", "taxonrank": "species", "hasmedia":
+        "0", "verbatimlocality": "North America | United States | New Mexico | Eddy
+        | 10 MI S CARLSBAD, BLACK RIVER VILLAGE ROAD", "countrycode": "US", "institutioncode":
+        "CM", "orgstateprovince": "Pennsylvania", "occurrencestatus": "present", "hastypestatus":
+        "0", "preparations": "whole animal in alcohol", "recordedby": "FRANZ, L R",
+        "isfossil": "0", "license": "https://creativecommons.org/publicdomain/zero/1.0/",
+        "wascaptive": "0", "georeferenceverificationstatus": "requires verification",
+        "modified": "2017-08-15", "haslicense": "1", "fieldnumber": "LRF 1512", "eventdate":
+        "1965-08-04", "individualcount": "1", "bibliographiccitation": "Carnegie Museum
+        of Natural History. CM Herps Collection. Record ID: urn:catalog:CM:Herps:116520.
+        Source: http://ipt.vertnet.org:8080/ipt/resource.do?r=cm_herps (source published
+        on 2017-09-27)", "citation": "Carnegie Museum of Natural History. CM Herps
+        Collection. Source: http://ipt.vertnet.org:8080/ipt/resource.do?r=cm_herps
+        (source published on 2017-09-27)", "georeferencesources": "ArcGIS software
+        with data from New Mexico Resource Geographic Information System Program (http://rgis.unm.edu)
+        and other inhouse resources (historical maps aiding with name changes)", "lastindexed":
+        "2017-10-19", "haslength": "0", "catalognumber": "116520", "emlrights": "Carnegie
+        Museum of Natural History (CM) data records may be used by individual researchers
+        or research groups, but they may not be repackaged, resold, or redistributed
+        in any form without the express written consent of a curatorial staff member
+        of the CM. If any of these records are used in an analysis or report, the
+        provenance of the original data must be acknowledged and the CM notified.
+        The CM and its staff are not responsible for damages, injury or loss due to
+        the use of these data.", "hasmass": "0", "gbifdatasetid": "76dd8f0d-2daa-4a69-9fcd-55e04230334a",
+        "locality": "10 MI S CARLSBAD, BLACK RIVER VILLAGE ROAD", "orgname": "Carnegie
+        Museum of Natural History", "keyname": "cm/herps/urn-catalog-cm-herps-116520",
+        "migrator": "2015-09-05", "recordnumber": "TSU 26", "icode": "CM", "gbifpublisherid":
+        "c1da06f0-580e-11dc-8a9e-b8a03c50a862", "class": "Amphibia", "decimallatitude":
+        "32.23", "mappable": "1", "nomenclaturalcode": "ICZN", "contact": "Stephen
+        Rogers", "order": "Anura", "enddayofyear": "216"}], "matching_records": 1,
+        "api_version": "api.py 2017-11-24T12:16-03:00"}'
+  recorded_at: 2020-01-29 16:51:58 GMT
+  recorded_with: vcr/0.4.0, webmockr/0.5.0